xserver git update 18/10/2010

2 files changed, 3917 insertions, 3915 deletions

diff --git a/xorg-server/dix/colormap.c b/xorg-server/dix/colormap.c
index 06bb0cbf4..12197acde 100644
--- a/xorg-server/dix/colormap.c
+++ b/xorg-server/dix/colormap.c
@@ -1,2757 +1,2758 @@
-/***********************************************************

-

-Copyright 1987, 1998  The Open Group

-

-Permission to use, copy, modify, distribute, and sell this software and its

-documentation for any purpose is hereby granted without fee, provided that

-the above copyright notice appear in all copies and that both that

-copyright notice and this permission notice appear in supporting

-documentation.

-

-The above copyright notice and this permission notice shall be included in

-all copies or substantial portions of the Software.

-

-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

-

-Except as contained in this notice, the name of The Open Group shall not be

-used in advertising or otherwise to promote the sale, use or other dealings

-in this Software without prior written authorization from The Open Group.

-

-

-Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

-

-                        All Rights Reserved

-

-Permission to use, copy, modify, and distribute this software and its 

-documentation for any purpose and without fee is hereby granted, 

-provided that the above copyright notice appear in all copies and that

-both that copyright notice and this permission notice appear in 

-supporting documentation, and that the name of Digital not be

-used in advertising or publicity pertaining to distribution of the

-software without specific, written prior permission.  

-

-DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING

-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL

-DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR

-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,

-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

-SOFTWARE.

-

-******************************************************************/

-

-

-#ifdef HAVE_DIX_CONFIG_H

-#include <dix-config.h>

-#endif

-

-#include <X11/X.h>

-#include <X11/Xproto.h>

-#include <stdio.h>

-#include <string.h>

-#include <strings.h>

-#include "misc.h"

-#include "dix.h"

-#include "colormapst.h"

-#include "os.h"

-#include "scrnintstr.h"

-#include "resource.h"

-#include "windowstr.h"

-#include "privates.h"

-#include "xace.h"

-

-static Pixel FindBestPixel(

-    EntryPtr /*pentFirst*/,

-    int /*size*/,

-    xrgb * /*prgb*/,

-    int /*channel*/

-);

-

-static int AllComp(

-    EntryPtr /*pent*/,

-    xrgb * /*prgb*/

-);

-

-static int RedComp(

-    EntryPtr /*pent*/,

-    xrgb * /*prgb*/

-);

-

-static int GreenComp(

-    EntryPtr /*pent*/,

-    xrgb * /*prgb*/

-);

-

-static int BlueComp(

-    EntryPtr /*pent*/,

-    xrgb * /*prgb*/

-);

-

-static void FreePixels(

-    ColormapPtr /*pmap*/,

-    int /*client*/

-);

-

-static void CopyFree(

-    int /*channel*/,

-    int /*client*/,

-    ColormapPtr /*pmapSrc*/,

-    ColormapPtr /*pmapDst*/

-);

-

-static void FreeCell(

-    ColormapPtr /*pmap*/,

-    Pixel /*i*/,

-    int /*channel*/

-);

-

-static void UpdateColors(

-    ColormapPtr /*pmap*/

-);

-

-static int AllocDirect(

-    int /*client*/,

-    ColormapPtr /*pmap*/,

-    int /*c*/,

-    int /*r*/,

-    int /*g*/,

-    int /*b*/,

-    Bool /*contig*/,

-    Pixel * /*pixels*/,

-    Pixel * /*prmask*/,

-    Pixel * /*pgmask*/,

-    Pixel * /*pbmask*/

-);

-

-static int AllocPseudo(

-    int /*client*/,

-    ColormapPtr /*pmap*/,

-    int /*c*/,

-    int /*r*/,

-    Bool /*contig*/,

-    Pixel * /*pixels*/,

-    Pixel * /*pmask*/,

-    Pixel ** /*pppixFirst*/

-);

-

-static Bool AllocCP(

-    ColormapPtr /*pmap*/,

-    EntryPtr /*pentFirst*/,

-    int /*count*/,

-    int /*planes*/,

-    Bool /*contig*/,

-    Pixel * /*pixels*/,

-    Pixel * /*pMask*/

-);

-

-static Bool AllocShared(

-    ColormapPtr /*pmap*/,

-    Pixel * /*ppix*/,

-    int /*c*/,

-    int /*r*/,

-    int /*g*/,

-    int /*b*/,

-    Pixel /*rmask*/,

-    Pixel /*gmask*/,

-    Pixel /*bmask*/,

-    Pixel * /*ppixFirst*/

-);

-

-static int FreeCo(

-    ColormapPtr /*pmap*/,

-    int /*client*/,

-    int /*color*/,

-    int /*npixIn*/,

-    Pixel * /*ppixIn*/,

-    Pixel /*mask*/

-);

-

-static int   TellNoMap(

-    WindowPtr	/*pwin*/,

-    Colormap 	* /*pmid*/

-);

-

-static void FindColorInRootCmap (

-    ColormapPtr	/* pmap */,

-    EntryPtr	/* pentFirst */,

-    int		/* size */,

-    xrgb*	/* prgb */,

-    Pixel*	/* pPixel */,

-    int		/* channel */,

-    ColorCompareProcPtr /* comp */

-);

-

-#define NUMRED(vis) ((vis->redMask >> vis->offsetRed) + 1)

-#define NUMGREEN(vis) ((vis->greenMask >> vis->offsetGreen) + 1)

-#define NUMBLUE(vis) ((vis->blueMask >> vis->offsetBlue) + 1)

-#if COMPOSITE

-#define ALPHAMASK(vis)	((vis)->nplanes < 32 ? 0 : \

-			 (CARD32) ~((vis)->redMask|(vis)->greenMask|(vis)->blueMask))

-#else

-#define ALPHAMASK(vis)	0

-#endif

-

-#define RGBMASK(vis) (vis->redMask | vis->greenMask | vis->blueMask | ALPHAMASK(vis))

-

-/* GetNextBitsOrBreak(bits, mask, base)  -- 

- * (Suggestion: First read the macro, then read this explanation.

- *

- * Either generate the next value to OR in to a pixel or break out of this

- * while loop 

- *

- * This macro is used when we're trying to generate all 2^n combinations of

- * bits in mask.  What we're doing here is counting in binary, except that

- * the bits we use to count may not be contiguous.  This macro will be

- * called 2^n times, returning a different value in bits each time. Then

- * it will cause us to break out of a surrounding loop. (It will always be

- * called from within a while loop.)

- * On call: mask is the value we want to find all the combinations for

- * base has 1 bit set where the least significant bit of mask is set

- *

- * For example,if mask is 01010, base should be 0010 and we count like this:

- * 00010 (see this isn't so hard), 

- *     then we add base to bits and get 0100. (bits & ~mask) is (0100 & 0100) so

- *      we add that to bits getting (0100 + 0100) =

- * 01000 for our next value.

- *      then we add 0010 to get 

- * 01010 and we're done (easy as 1, 2, 3)

- */

-#define GetNextBitsOrBreak(bits, mask, base)	\

-	    if((bits) == (mask)) 		\

-		break;		 		\

-	    (bits) += (base);		 	\

-	    while((bits) & ~(mask))		\

-		(bits) += ((bits) & ~(mask));	

-/* ID of server as client */

-#define SERVER_ID	0

-

-typedef struct _colorResource

-{

-	Colormap	mid;

-	int		client;

-} colorResource;

-

-/* Invariants:

- * refcnt == 0 means entry is empty

- * refcnt > 0 means entry is useable by many clients, so it can't be changed

- * refcnt == AllocPrivate means entry owned by one client only

- * fShared should only be set if refcnt == AllocPrivate, and only in red map

- */

-

-

-/** 

- * Create and initialize the color map 

- * 

- * \param mid    resource to use for this colormap

- * \param alloc  1 iff all entries are allocated writable

- */

-int

-CreateColormap (Colormap mid, ScreenPtr pScreen, VisualPtr pVisual, 

-                ColormapPtr *ppcmap, int alloc, int client)

-{

-    int		class, size;

-    unsigned long sizebytes;

-    ColormapPtr	pmap;

-    EntryPtr	pent;

-    int		i;

-    Pixel	*ppix, **pptr;

-

-    class = pVisual->class;

-    if(!(class & DynamicClass) && (alloc != AllocNone) && (client != SERVER_ID))

-	return (BadMatch);

-

-    size = pVisual->ColormapEntries;

-    sizebytes = (size * sizeof(Entry)) +

-		(MAXCLIENTS * sizeof(Pixel *)) +

-		(MAXCLIENTS * sizeof(int));

-    if ((class | DynamicClass) == DirectColor)

-	sizebytes *= 3;

-    sizebytes += sizeof(ColormapRec);

-    pmap = malloc(sizebytes);

-    if (!pmap)

-	return (BadAlloc);

-#if defined(_XSERVER64)

-    pmap->pad0 = 0;

-    pmap->pad1 = 0;

-#if (X_BYTE_ORDER == X_LITTLE_ENDIAN)

-    pmap->pad2 = 0;

-#endif

-#endif

-    pmap->red = (EntryPtr)((char *)pmap + sizeof(ColormapRec));    

-    sizebytes = size * sizeof(Entry);

-    pmap->clientPixelsRed = (Pixel **)((char *)pmap->red + sizebytes);

-    pmap->numPixelsRed = (int *)((char *)pmap->clientPixelsRed +

-				 (MAXCLIENTS * sizeof(Pixel *)));

-    pmap->mid = mid;

-    pmap->flags = 0; 	/* start out with all flags clear */

-    if(mid == pScreen->defColormap)

-	pmap->flags |= IsDefault;

-    pmap->pScreen = pScreen;

-    pmap->pVisual = pVisual;

-    pmap->class = class;

-    if ((class | DynamicClass) == DirectColor)

-	size = NUMRED(pVisual);

-    pmap->freeRed = size;

-    bzero ((char *) pmap->red, (int)sizebytes);

-    bzero((char *) pmap->numPixelsRed, MAXCLIENTS * sizeof(int));

-    for (pptr = &pmap->clientPixelsRed[MAXCLIENTS]; --pptr >= pmap->clientPixelsRed; )

-	*pptr = (Pixel *)NULL;

-    if (alloc == AllocAll)

-    {

-	if (class & DynamicClass)

-	    pmap->flags |= AllAllocated;

-	for (pent = &pmap->red[size - 1]; pent >= pmap->red; pent--)

-	    pent->refcnt = AllocPrivate;

-	pmap->freeRed = 0;

-	ppix = malloc(size * sizeof(Pixel));

-	if (!ppix)

-	{

-	    free(pmap);

-	    return (BadAlloc);

-	}

-	pmap->clientPixelsRed[client] = ppix;

-	for(i = 0; i < size; i++)

-	    ppix[i] = i;

-	pmap->numPixelsRed[client] = size;

-    }

-

-    if ((class | DynamicClass) == DirectColor)

-    {

-	pmap->freeGreen = NUMGREEN(pVisual);

-	pmap->green = (EntryPtr)((char *)pmap->numPixelsRed +

-				 (MAXCLIENTS * sizeof(int)));

-	pmap->clientPixelsGreen = (Pixel **)((char *)pmap->green + sizebytes);

-	pmap->numPixelsGreen = (int *)((char *)pmap->clientPixelsGreen +

-				       (MAXCLIENTS * sizeof(Pixel *)));

-	pmap->freeBlue = NUMBLUE(pVisual);

-	pmap->blue = (EntryPtr)((char *)pmap->numPixelsGreen +

-				(MAXCLIENTS * sizeof(int)));

-	pmap->clientPixelsBlue = (Pixel **)((char *)pmap->blue + sizebytes);

-	pmap->numPixelsBlue = (int *)((char *)pmap->clientPixelsBlue +

-				      (MAXCLIENTS * sizeof(Pixel *)));

-

-	bzero ((char *) pmap->green, (int)sizebytes);

-	bzero ((char *) pmap->blue, (int)sizebytes);

-

-	memmove((char *) pmap->clientPixelsGreen,

-		(char *) pmap->clientPixelsRed,

-	      MAXCLIENTS * sizeof(Pixel *));

-	memmove((char *) pmap->clientPixelsBlue,

-		(char *) pmap->clientPixelsRed,

-	      MAXCLIENTS * sizeof(Pixel *));

-	bzero((char *) pmap->numPixelsGreen, MAXCLIENTS * sizeof(int));

-	bzero((char *) pmap->numPixelsBlue, MAXCLIENTS * sizeof(int));

-

-	/* If every cell is allocated, mark its refcnt */

-	if (alloc == AllocAll)

-	{

-	    size = pmap->freeGreen;

-	    for(pent = &pmap->green[size-1]; pent >= pmap->green; pent--)

-		pent->refcnt = AllocPrivate;

-	    pmap->freeGreen = 0;

-	    ppix = malloc(size * sizeof(Pixel));

-	    if (!ppix)

-	    {

-		free(pmap->clientPixelsRed[client]);

-		free(pmap);

-		return(BadAlloc);

-	    }

-	    pmap->clientPixelsGreen[client] = ppix;

-	    for(i = 0; i < size; i++)

-		ppix[i] = i;

-	    pmap->numPixelsGreen[client] = size;

-

-	    size = pmap->freeBlue;

-	    for(pent = &pmap->blue[size-1]; pent >= pmap->blue; pent--)

-		pent->refcnt = AllocPrivate;

-	    pmap->freeBlue = 0;

-	    ppix = malloc(size * sizeof(Pixel));

-	    if (!ppix)

-	    {

-		free(pmap->clientPixelsGreen[client]);

-		free(pmap->clientPixelsRed[client]);

-		free(pmap);

-		return(BadAlloc);

-	    }

-	    pmap->clientPixelsBlue[client] = ppix;

-	    for(i = 0; i < size; i++)

-		ppix[i] = i;

-	    pmap->numPixelsBlue[client] = size;

-	}

-    }

-    pmap->devPrivates = NULL;

-    pmap->flags |= BeingCreated;

-

-    if (!AddResource(mid, RT_COLORMAP, (pointer)pmap))

-	return (BadAlloc);

-

-    /*  

-     * Security creation/labeling check

-     */

-    i = XaceHook(XACE_RESOURCE_ACCESS, clients[client], mid, RT_COLORMAP,

-		 pmap, RT_NONE, NULL, DixCreateAccess);

-    if (i != Success) {

-	FreeResource(mid, RT_NONE);

-	return i;

-    }

-

-    /* If the device wants a chance to initialize the colormap in any way,

-     * this is it.  In specific, if this is a Static colormap, this is the

-     * time to fill in the colormap's values */

-    if (!(*pScreen->CreateColormap)(pmap))

-    {

-	FreeResource (mid, RT_NONE);

-	return BadAlloc;

-    }

-    pmap->flags &= ~BeingCreated;

-    *ppcmap = pmap;

-    return (Success);

-}

-

-/**

- *

- * \param value  must conform to DeleteType

- */

-int

-FreeColormap (pointer value, XID mid)

-{

-    int	i;

-    EntryPtr pent;

-    ColormapPtr	pmap = (ColormapPtr)value;

-

-    if(CLIENT_ID(mid) != SERVER_ID)

-    {

-        (*pmap->pScreen->UninstallColormap) (pmap);

-        WalkTree(pmap->pScreen, (VisitWindowProcPtr)TellNoMap, (pointer) &mid);

-    }

-

-    /* This is the device's chance to undo anything it needs to, especially

-     * to free any storage it allocated */

-    (*pmap->pScreen->DestroyColormap)(pmap);

-

-    if(pmap->clientPixelsRed)

-    {

-	for(i = 0; i < MAXCLIENTS; i++)

-	    free(pmap->clientPixelsRed[i]);

-    }

-

-    if ((pmap->class == PseudoColor) || (pmap->class == GrayScale))

-    {

-	for(pent = &pmap->red[pmap->pVisual->ColormapEntries - 1];

-	    pent >= pmap->red;

-	    pent--)

-	{

-	    if(pent->fShared)

-	    {

-		if (--pent->co.shco.red->refcnt == 0)

-		    free(pent->co.shco.red);

-		if (--pent->co.shco.green->refcnt == 0)

-		    free(pent->co.shco.green);

-		if (--pent->co.shco.blue->refcnt == 0)

-		    free(pent->co.shco.blue);

-	    }

-	}

-    }

-    if((pmap->class | DynamicClass) == DirectColor)

-    {

-        for(i = 0; i < MAXCLIENTS; i++)

-	{

-            free(pmap->clientPixelsGreen[i]);

-            free(pmap->clientPixelsBlue[i]);

-        }

-    }

-

-    dixFreePrivates(pmap->devPrivates);

-    free(pmap);

-    return(Success);

-}

-

-/* Tell window that pmid has disappeared */

-static int

-TellNoMap (WindowPtr pwin, Colormap *pmid)

-{

-    xEvent 	xE;

-

-    if (wColormap(pwin) == *pmid)

-    {

-	/* This should be call to DeliverEvent */

-	xE.u.u.type = ColormapNotify;

-	xE.u.colormap.window = pwin->drawable.id;

-	xE.u.colormap.colormap = None;

-	xE.u.colormap.new = TRUE;

-	xE.u.colormap.state = ColormapUninstalled;

-#ifdef PANORAMIX

-        if(noPanoramiXExtension || !pwin->drawable.pScreen->myNum)

-#endif

-	   DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);

-	if (pwin->optional) {

-	    pwin->optional->colormap = None;

-	    CheckWindowOptionalNeed (pwin);

-	}

-    }

-

-    return (WT_WALKCHILDREN);

-}

-

-/* Tell window that pmid got uninstalled */

-int

-TellLostMap (WindowPtr pwin, pointer value)

-{

-    Colormap 	*pmid = (Colormap *)value;

-    xEvent 	xE;

-

-#ifdef PANORAMIX

-    if(!noPanoramiXExtension && pwin->drawable.pScreen->myNum)

-	return WT_STOPWALKING;

-#endif

-    if (wColormap(pwin) == *pmid)

-    {

-	/* This should be call to DeliverEvent */

-	xE.u.u.type = ColormapNotify;

-	xE.u.colormap.window = pwin->drawable.id;

-	xE.u.colormap.colormap = *pmid;

-	xE.u.colormap.new = FALSE;

-	xE.u.colormap.state = ColormapUninstalled;

-	DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);

-    }

-

-    return (WT_WALKCHILDREN);

-}

-

-/* Tell window that pmid got installed */

-int

-TellGainedMap (WindowPtr pwin, pointer value)

-{

-    Colormap 	*pmid = (Colormap *)value;

-    xEvent 	xE;

-

-#ifdef PANORAMIX

-    if(!noPanoramiXExtension && pwin->drawable.pScreen->myNum)

-	return WT_STOPWALKING;

-#endif

-    if (wColormap (pwin) == *pmid)

-    {

-	/* This should be call to DeliverEvent */

-	xE.u.u.type = ColormapNotify;

-	xE.u.colormap.window = pwin->drawable.id;

-	xE.u.colormap.colormap = *pmid;

-	xE.u.colormap.new = FALSE;

-	xE.u.colormap.state = ColormapInstalled;

-	DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);

-    }

-

-    return (WT_WALKCHILDREN);

-}

-

-  

-int

-CopyColormapAndFree (Colormap mid, ColormapPtr pSrc, int client)

-{

-    ColormapPtr	pmap = (ColormapPtr) NULL;

-    int		result, alloc, size;

-    Colormap	midSrc;

-    ScreenPtr	pScreen;

-    VisualPtr	pVisual;

-

-    pScreen = pSrc->pScreen;

-    pVisual = pSrc->pVisual;

-    midSrc = pSrc->mid;

-    alloc = ((pSrc->flags & AllAllocated) && CLIENT_ID(midSrc) == client) ?

-            AllocAll : AllocNone;

-    size = pVisual->ColormapEntries;

-

-    /* If the create returns non-0, it failed */

-    result = CreateColormap (mid, pScreen, pVisual, &pmap, alloc, client);

-    if(result != Success)

-        return(result);

-    if(alloc == AllocAll)

-    {

-	memmove((char *)pmap->red, (char *)pSrc->red, size * sizeof(Entry));

-	if((pmap->class | DynamicClass) == DirectColor)

-	{

-	    memmove((char *)pmap->green, (char *)pSrc->green, size * sizeof(Entry));

-	    memmove((char *)pmap->blue, (char *)pSrc->blue, size * sizeof(Entry));

-	}

-	pSrc->flags &= ~AllAllocated;

-	FreePixels(pSrc, client);

-	UpdateColors(pmap);

-	return(Success);

-    }

-

-    CopyFree(REDMAP, client, pSrc, pmap);

-    if ((pmap->class | DynamicClass) == DirectColor)

-    {

-	CopyFree(GREENMAP, client, pSrc, pmap);

-	CopyFree(BLUEMAP, client, pSrc, pmap);

-    }

-    if (pmap->class & DynamicClass)

-	UpdateColors(pmap);

-    /* XXX should worry about removing any RT_CMAPENTRY resource */

-    return(Success);

-}

-

-/* Helper routine for freeing large numbers of cells from a map */

-static void

-CopyFree (int channel, int client, ColormapPtr pmapSrc, ColormapPtr pmapDst)

-{

-    int		z, npix;

-    EntryPtr	pentSrcFirst, pentDstFirst;

-    EntryPtr	pentSrc, pentDst;

-    Pixel	*ppix;

-    int		nalloc;

-

-    switch(channel)

-    {

-      default:	/* so compiler can see that everything gets initialized */

-      case REDMAP:

-	ppix = (pmapSrc->clientPixelsRed)[client];

-	npix = (pmapSrc->numPixelsRed)[client];

-	pentSrcFirst = pmapSrc->red;

-	pentDstFirst = pmapDst->red;

-	break;

-      case GREENMAP:

-	ppix = (pmapSrc->clientPixelsGreen)[client];

-	npix = (pmapSrc->numPixelsGreen)[client];

-	pentSrcFirst = pmapSrc->green;

-	pentDstFirst = pmapDst->green;

-	break;

-      case BLUEMAP:

-	ppix = (pmapSrc->clientPixelsBlue)[client];

-	npix = (pmapSrc->numPixelsBlue)[client];

-	pentSrcFirst = pmapSrc->blue;

-	pentDstFirst = pmapDst->blue;

-	break;

-    }

-    nalloc = 0;

-    if (pmapSrc->class & DynamicClass)

-    {

-	for(z = npix; --z >= 0; ppix++)

-	{

-	    /* Copy entries */

-	    pentSrc = pentSrcFirst + *ppix;

-	    pentDst = pentDstFirst + *ppix;

-	    if (pentDst->refcnt > 0)

-	    {

-		pentDst->refcnt++;

-	    }

-	    else

-	    {

-		*pentDst = *pentSrc;

-		nalloc++;

-		if (pentSrc->refcnt > 0)

-		    pentDst->refcnt = 1;

-		else

-		    pentSrc->fShared = FALSE;

-	    }

-	    FreeCell(pmapSrc, *ppix, channel);

-	}

-    }

-

-    /* Note that FreeCell has already fixed pmapSrc->free{Color} */

-    switch(channel)

-    {

-      case REDMAP:

-        pmapDst->freeRed -= nalloc;

-        (pmapDst->clientPixelsRed)[client] =

-	    (pmapSrc->clientPixelsRed)[client];

-        (pmapSrc->clientPixelsRed)[client] = (Pixel *) NULL;

-        (pmapDst->numPixelsRed)[client] = (pmapSrc->numPixelsRed)[client];

-        (pmapSrc->numPixelsRed)[client] = 0;

-	break;

-      case GREENMAP:

-        pmapDst->freeGreen -= nalloc;

-        (pmapDst->clientPixelsGreen)[client] =

-	    (pmapSrc->clientPixelsGreen)[client];

-        (pmapSrc->clientPixelsGreen)[client] = (Pixel *) NULL;

-        (pmapDst->numPixelsGreen)[client] = (pmapSrc->numPixelsGreen)[client];

-        (pmapSrc->numPixelsGreen)[client] = 0;

-	break;

-      case BLUEMAP:

-        pmapDst->freeBlue -= nalloc;

-        pmapDst->clientPixelsBlue[client] = pmapSrc->clientPixelsBlue[client];

-        pmapSrc->clientPixelsBlue[client] = (Pixel *) NULL;

-        pmapDst->numPixelsBlue[client] = pmapSrc->numPixelsBlue[client];

-        pmapSrc->numPixelsBlue[client] = 0;

-	break;

-    }

-}

-

-/* Free the ith entry in a color map.  Must handle freeing of

- * colors allocated through AllocColorPlanes */

-static void

-FreeCell (ColormapPtr pmap, Pixel i, int channel)

-{

-    EntryPtr pent;

-    int	*pCount;

-

-

-    switch (channel)

-    {

-      default:	/* so compiler can see that everything gets initialized */

-      case PSEUDOMAP:

-      case REDMAP:

-          pent = (EntryPtr) &pmap->red[i];

-	  pCount = &pmap->freeRed;

-	  break;

-      case GREENMAP:

-          pent = (EntryPtr) &pmap->green[i];

-	  pCount = &pmap->freeGreen;

-	  break;

-      case BLUEMAP:

-          pent = (EntryPtr) &pmap->blue[i];

-	  pCount = &pmap->freeBlue;

-	  break;

-    }

-    /* If it's not privately allocated and it's not time to free it, just

-     * decrement the count */

-    if (pent->refcnt > 1)

-	pent->refcnt--;

-    else

-    {

-        /* If the color type is shared, find the sharedcolor. If decremented

-         * refcnt is 0, free the shared cell. */

-        if (pent->fShared)

-	{

-	    if(--pent->co.shco.red->refcnt == 0)

-		free(pent->co.shco.red);

-	    if(--pent->co.shco.green->refcnt == 0)

-		free(pent->co.shco.green);

-	    if(--pent->co.shco.blue->refcnt == 0)

-		free(pent->co.shco.blue);

-	    pent->fShared = FALSE;

-	}

-	pent->refcnt = 0;

-	*pCount += 1;

-    }

-}

-

-static void

-UpdateColors (ColormapPtr pmap)

-{

-    xColorItem		*defs;

-    xColorItem *pdef;

-    EntryPtr 	pent;

-    VisualPtr	pVisual;

-    int			i, n, size;

-

-    pVisual = pmap->pVisual;

-    size = pVisual->ColormapEntries;

-    defs = malloc(size * sizeof(xColorItem));

-    if (!defs)

-	return;

-    n = 0;

-    pdef = defs;

-    if (pmap->class == DirectColor)

-    {

-        for (i = 0; i < size; i++)

-	{

-	    if (!pmap->red[i].refcnt &&

-		!pmap->green[i].refcnt &&

-		!pmap->blue[i].refcnt)

-		continue;

-	    pdef->pixel = ((Pixel)i << pVisual->offsetRed) |

-			  ((Pixel)i << pVisual->offsetGreen) |

-			  ((Pixel)i << pVisual->offsetBlue);

-	    pdef->red = pmap->red[i].co.local.red;

-	    pdef->green = pmap->green[i].co.local.green;

-	    pdef->blue = pmap->blue[i].co.local.blue;

-	    pdef->flags = DoRed|DoGreen|DoBlue;

-	    pdef++;

-	    n++;

-	}

-    }

-    else

-    {

-        for (i = 0, pent = pmap->red; i < size; i++, pent++)

-	{

-	    if (!pent->refcnt)

-		continue;

-	    pdef->pixel = i;

-	    if(pent->fShared)

-	    {

-		pdef->red = pent->co.shco.red->color;

-		pdef->green = pent->co.shco.green->color;

-		pdef->blue = pent->co.shco.blue->color;

-	    }

-	    else

-	    {

-		pdef->red = pent->co.local.red;

-		pdef->green = pent->co.local.green;

-		pdef->blue = pent->co.local.blue;

-	    }

-	    pdef->flags = DoRed|DoGreen|DoBlue;

-	    pdef++;

-	    n++;

-	}

-    }

-    if (n)

-	(*pmap->pScreen->StoreColors)(pmap, n, defs);

-    free(defs);

-}

-

-/* Get a read-only color from a ColorMap (probably slow for large maps)

- * Returns by changing the value in pred, pgreen, pblue and pPix

- */

-int

-AllocColor (ColormapPtr pmap, 

-            unsigned short *pred, unsigned short *pgreen, unsigned short *pblue, 

-            Pixel *pPix, int client)

-{

-    Pixel	pixR, pixG, pixB;

-    int		entries;

-    xrgb	rgb;

-    int		class;

-    VisualPtr	pVisual;

-    int		npix;

-    Pixel	*ppix;

-

-    pVisual = pmap->pVisual;

-    (*pmap->pScreen->ResolveColor) (pred, pgreen, pblue, pVisual);

-    rgb.red = *pred;

-    rgb.green = *pgreen;

-    rgb.blue = *pblue;

-    class = pmap->class;

-    entries = pVisual->ColormapEntries;

-

-    /* If the colormap is being created, then we want to be able to change

-     * the colormap, even if it's a static type. Otherwise, we'd never be

-     * able to initialize static colormaps

-     */

-    if(pmap->flags & BeingCreated)

-	class |= DynamicClass;

-

-    /* If this is one of the static storage classes, and we're not initializing

-     * it, the best we can do is to find the closest color entry to the

-     * requested one and return that.

-     */

-    switch (class) {

-    case StaticColor:

-    case StaticGray:

-	/* Look up all three components in the same pmap */

-	*pPix = pixR = FindBestPixel(pmap->red, entries, &rgb, PSEUDOMAP);

-	*pred = pmap->red[pixR].co.local.red;

-	*pgreen = pmap->red[pixR].co.local.green;

-	*pblue = pmap->red[pixR].co.local.blue;

-	npix = pmap->numPixelsRed[client];

-	ppix = (Pixel *) realloc(pmap->clientPixelsRed[client],

-				  (npix + 1) * sizeof(Pixel));

-	if (!ppix)

-	    return (BadAlloc);

-	ppix[npix] = pixR;

-	pmap->clientPixelsRed[client] = ppix;

-	pmap->numPixelsRed[client]++;

-	break;

-

-    case TrueColor:

-	/* Look up each component in its own map, then OR them together */

-	pixR = FindBestPixel(pmap->red, NUMRED(pVisual), &rgb, REDMAP);

-	pixG = FindBestPixel(pmap->green, NUMGREEN(pVisual), &rgb, GREENMAP);

-	pixB = FindBestPixel(pmap->blue, NUMBLUE(pVisual), &rgb, BLUEMAP);

-	*pPix = (pixR << pVisual->offsetRed) |

-		(pixG << pVisual->offsetGreen) |

-		(pixB << pVisual->offsetBlue) |

-		ALPHAMASK(pVisual);

-	

-	*pred = pmap->red[pixR].co.local.red;

-	*pgreen = pmap->green[pixG].co.local.green;

-	*pblue = pmap->blue[pixB].co.local.blue;

-	npix = pmap->numPixelsRed[client];

-	ppix = (Pixel *) realloc(pmap->clientPixelsRed[client],

-				  (npix + 1) * sizeof(Pixel));

-	if (!ppix)

-	    return (BadAlloc);

-	ppix[npix] = pixR;

-	pmap->clientPixelsRed[client] = ppix;

-	npix = pmap->numPixelsGreen[client];

-	ppix = (Pixel *) realloc(pmap->clientPixelsGreen[client],

-				  (npix + 1) * sizeof(Pixel));

-	if (!ppix)

-	    return (BadAlloc);

-	ppix[npix] = pixG;

-	pmap->clientPixelsGreen[client] = ppix;

-	npix = pmap->numPixelsBlue[client];

-	ppix = (Pixel *) realloc(pmap->clientPixelsBlue[client],

-				  (npix + 1) * sizeof(Pixel));

-	if (!ppix)

-	    return (BadAlloc);

-	ppix[npix] = pixB;

-	pmap->clientPixelsBlue[client] = ppix;

-	pmap->numPixelsRed[client]++;

-	pmap->numPixelsGreen[client]++;

-	pmap->numPixelsBlue[client]++;

-	break;

-

-    case GrayScale:

-    case PseudoColor:

-	if (pmap->mid != pmap->pScreen->defColormap &&

-	    pmap->pVisual->vid == pmap->pScreen->rootVisual)

-	{

-	    ColormapPtr prootmap;

-	    dixLookupResourceByType((pointer *)&prootmap, pmap->pScreen->defColormap,

-				    RT_COLORMAP, clients[client], DixReadAccess);

-

-	    if (pmap->class == prootmap->class)

-		FindColorInRootCmap (prootmap, prootmap->red, entries, &rgb, 

-			pPix, PSEUDOMAP, AllComp);

-	}

-	if (FindColor(pmap, pmap->red, entries, &rgb, pPix, PSEUDOMAP,

-		      client, AllComp) != Success)

-	    return (BadAlloc);

-        break;

-

-    case DirectColor:

-	if (pmap->mid != pmap->pScreen->defColormap &&

-	    pmap->pVisual->vid == pmap->pScreen->rootVisual)

-	{

-	    ColormapPtr prootmap;

-	    dixLookupResourceByType((pointer *)&prootmap, pmap->pScreen->defColormap,

-				    RT_COLORMAP, clients[client], DixReadAccess);

-

-	    if (pmap->class == prootmap->class)

-	    {

-		pixR = (*pPix & pVisual->redMask) >> pVisual->offsetRed; 

-		FindColorInRootCmap (prootmap, prootmap->red, entries, &rgb, 

-			&pixR, REDMAP, RedComp);

-		pixG = (*pPix & pVisual->greenMask) >> pVisual->offsetGreen; 

-		FindColorInRootCmap (prootmap, prootmap->green, entries, &rgb, 

-			&pixG, GREENMAP, GreenComp);

-		pixB = (*pPix & pVisual->blueMask) >> pVisual->offsetBlue; 

-		FindColorInRootCmap (prootmap, prootmap->blue, entries, &rgb, 

-			&pixB, BLUEMAP, BlueComp);

-		*pPix = pixR | pixG | pixB;

-	    }

-	}

-

-	pixR = (*pPix & pVisual->redMask) >> pVisual->offsetRed; 

-	if (FindColor(pmap, pmap->red, NUMRED(pVisual), &rgb, &pixR, REDMAP,

-		      client, RedComp) != Success)

-	    return (BadAlloc);

-	pixG = (*pPix & pVisual->greenMask) >> pVisual->offsetGreen; 

-	if (FindColor(pmap, pmap->green, NUMGREEN(pVisual), &rgb, &pixG,

-		      GREENMAP, client, GreenComp) != Success)

-	{

-	    (void)FreeCo(pmap, client, REDMAP, 1, &pixR, (Pixel)0);

-	    return (BadAlloc);

-	}

-	pixB = (*pPix & pVisual->blueMask) >> pVisual->offsetBlue; 

-	if (FindColor(pmap, pmap->blue, NUMBLUE(pVisual), &rgb, &pixB, BLUEMAP,

-		      client, BlueComp) != Success)

-	{

-	    (void)FreeCo(pmap, client, GREENMAP, 1, &pixG, (Pixel)0);

-	    (void)FreeCo(pmap, client, REDMAP, 1, &pixR, (Pixel)0);

-	    return (BadAlloc);

-	}

-	*pPix = pixR | pixG | pixB | ALPHAMASK(pVisual);

-

-	break;

-    }

-

-    /* if this is the client's first pixel in this colormap, tell the

-     * resource manager that the client has pixels in this colormap which

-     * should be freed when the client dies */

-    if ((pmap->numPixelsRed[client] == 1) &&

-	(CLIENT_ID(pmap->mid) != client) &&

-	!(pmap->flags & BeingCreated))

-    {

-	colorResource	*pcr;

-

-	pcr = malloc(sizeof(colorResource));

-	if (!pcr)

-	{

-	    (void)FreeColors(pmap, client, 1, pPix, (Pixel)0);

-	    return (BadAlloc);

-	}

-	pcr->mid = pmap->mid;

-	pcr->client = client;

-	if (!AddResource(FakeClientID(client), RT_CMAPENTRY, (pointer)pcr))

-	    return (BadAlloc);

-    }

-    return (Success);

-}

-

-/*

- * FakeAllocColor -- fake an AllocColor request by

- * returning a free pixel if availible, otherwise returning

- * the closest matching pixel.  This is used by the mi

- * software sprite code to recolor cursors.  A nice side-effect

- * is that this routine will never return failure.

- */

-

-void

-FakeAllocColor (ColormapPtr pmap, xColorItem *item)

-{

-    Pixel pixR, pixG, pixB;

-    Pixel temp;

-    int	entries;

-    xrgb rgb;

-    int	class;

-    VisualPtr pVisual;

-

-    pVisual = pmap->pVisual;

-    rgb.red = item->red;

-    rgb.green = item->green;

-    rgb.blue = item->blue;

-    (*pmap->pScreen->ResolveColor) (&rgb.red, &rgb.green, &rgb.blue, pVisual);

-    class = pmap->class;

-    entries = pVisual->ColormapEntries;

-

-    switch (class) {

-    case GrayScale:

-    case PseudoColor:

-	temp = 0;

-	item->pixel = 0;

-	if (FindColor(pmap, pmap->red, entries, &rgb, &temp, PSEUDOMAP,

-		      -1, AllComp) == Success) {

-	    item->pixel = temp;

-	    break;

-	}

-	/* fall through ... */

-    case StaticColor:

-    case StaticGray:

-	item->pixel = FindBestPixel(pmap->red, entries, &rgb, PSEUDOMAP);

-	break;

-

-    case DirectColor:

-	/* Look up each component in its own map, then OR them together */

-	pixR = (item->pixel & pVisual->redMask) >> pVisual->offsetRed; 

-	pixG = (item->pixel & pVisual->greenMask) >> pVisual->offsetGreen; 

-	pixB = (item->pixel & pVisual->blueMask) >> pVisual->offsetBlue; 

-	if (FindColor(pmap, pmap->red, NUMRED(pVisual), &rgb, &pixR, REDMAP,

-		      -1, RedComp) != Success)

-	    pixR = FindBestPixel(pmap->red, NUMRED(pVisual), &rgb, REDMAP)

-			<< pVisual->offsetRed;

-	if (FindColor(pmap, pmap->green, NUMGREEN(pVisual), &rgb, &pixG,

-		      GREENMAP, -1, GreenComp) != Success)

-	    pixG = FindBestPixel(pmap->green, NUMGREEN(pVisual), &rgb,

-				 GREENMAP) << pVisual->offsetGreen;

-	if (FindColor(pmap, pmap->blue, NUMBLUE(pVisual), &rgb, &pixB, BLUEMAP,

-		      -1, BlueComp) != Success)

-	    pixB = FindBestPixel(pmap->blue, NUMBLUE(pVisual), &rgb, BLUEMAP)

-			<< pVisual->offsetBlue;

-	item->pixel = pixR | pixG | pixB;

-	break;

-

-    case TrueColor:

-	/* Look up each component in its own map, then OR them together */

-	pixR = FindBestPixel(pmap->red, NUMRED(pVisual), &rgb, REDMAP);

-	pixG = FindBestPixel(pmap->green, NUMGREEN(pVisual), &rgb, GREENMAP);

-	pixB = FindBestPixel(pmap->blue, NUMBLUE(pVisual), &rgb, BLUEMAP);

-	item->pixel = (pixR << pVisual->offsetRed) |

-		      (pixG << pVisual->offsetGreen) |

-		      (pixB << pVisual->offsetBlue);

-	break;

-    }

-}

-

-/* free a pixel value obtained from FakeAllocColor */

-void

-FakeFreeColor(ColormapPtr pmap, Pixel pixel)

-{

-    VisualPtr pVisual;

-    Pixel pixR, pixG, pixB;

-

-    switch (pmap->class) {

-    case GrayScale:

-    case PseudoColor:

-	if (pmap->red[pixel].refcnt == AllocTemporary)

-	    pmap->red[pixel].refcnt = 0;

-	break;

-    case DirectColor:

-	pVisual = pmap->pVisual;

-	pixR = (pixel & pVisual->redMask) >> pVisual->offsetRed; 

-	pixG = (pixel & pVisual->greenMask) >> pVisual->offsetGreen; 

-	pixB = (pixel & pVisual->blueMask) >> pVisual->offsetBlue; 

-	if (pmap->red[pixR].refcnt == AllocTemporary)

-	    pmap->red[pixR].refcnt = 0;

-	if (pmap->green[pixG].refcnt == AllocTemporary)

-	    pmap->green[pixG].refcnt = 0;

-	if (pmap->blue[pixB].refcnt == AllocTemporary)

-	    pmap->blue[pixB].refcnt = 0;

-	break;

-    }

-}

-

-typedef unsigned short	BigNumUpper;

-typedef unsigned long	BigNumLower;

-

-#define BIGNUMLOWERBITS	24

-#define BIGNUMUPPERBITS	16

-#define BIGNUMLOWER (1 << BIGNUMLOWERBITS)

-#define BIGNUMUPPER (1 << BIGNUMUPPERBITS)

-#define UPPERPART(i)	((i) >> BIGNUMLOWERBITS)

-#define LOWERPART(i)	((i) & (BIGNUMLOWER - 1))

-

-typedef struct _bignum {

-    BigNumUpper	upper;

-    BigNumLower	lower;

-} BigNumRec, *BigNumPtr;

-

-#define BigNumGreater(x,y) (((x)->upper > (y)->upper) ||\

-			    ((x)->upper == (y)->upper && (x)->lower > (y)->lower))

-

-#define UnsignedToBigNum(u,r)	(((r)->upper = UPPERPART(u)), \

-				 ((r)->lower = LOWERPART(u)))

-

-#define MaxBigNum(r)		(((r)->upper = BIGNUMUPPER-1), \

-				 ((r)->lower = BIGNUMLOWER-1))

-

-static void

-BigNumAdd (BigNumPtr x, BigNumPtr y, BigNumPtr r)

-{

-    BigNumLower	lower, carry = 0;

-

-    lower = x->lower + y->lower;

-    if (lower >= BIGNUMLOWER) {

-	lower -= BIGNUMLOWER;

-	carry = 1;

-    }

-    r->lower = lower;

-    r->upper = x->upper + y->upper + carry;

-}

-

-static Pixel

-FindBestPixel(EntryPtr pentFirst, int size, xrgb *prgb, int channel)

-{

-    EntryPtr	pent;

-    Pixel	pixel, final;

-    long	dr, dg, db;

-    unsigned long   sq;

-    BigNumRec	minval, sum, temp;

-

-    final = 0;

-    MaxBigNum(&minval);

-    /* look for the minimal difference */

-    for (pent = pentFirst, pixel = 0; pixel < size; pent++, pixel++)

-    {

-	dr = dg = db = 0;

-	switch(channel)

-	{

-	  case PSEUDOMAP:

-	      dg = (long) pent->co.local.green - prgb->green;

-	      db = (long) pent->co.local.blue - prgb->blue;

-	  case REDMAP:

-	      dr = (long) pent->co.local.red - prgb->red;

-	      break;

-	  case GREENMAP:

-	      dg = (long) pent->co.local.green - prgb->green;

-	      break;

-	  case BLUEMAP:

-	      db = (long) pent->co.local.blue - prgb->blue;

-	      break;

-	}

-	sq = dr * dr;

-	UnsignedToBigNum (sq, &sum);

-	sq = dg * dg;

-	UnsignedToBigNum (sq, &temp);

-	BigNumAdd (&sum, &temp, &sum);

-	sq = db * db;

-	UnsignedToBigNum (sq, &temp);

-	BigNumAdd (&sum, &temp, &sum);

-	if (BigNumGreater (&minval, &sum))

-	{

-	    final = pixel;

-	    minval = sum;

-	}

-    }

-    return(final);

-}

-

-static void

-FindColorInRootCmap (ColormapPtr pmap, EntryPtr pentFirst, int size, 

-                     xrgb *prgb, Pixel *pPixel, int channel, 

-                     ColorCompareProcPtr comp)

-{

-    EntryPtr    pent;

-    Pixel	pixel;

-    int         count;

-

-    if ((pixel = *pPixel) >= size)

-	pixel = 0;

-    for (pent = pentFirst + pixel, count = size; --count >= 0; pent++, pixel++)

-    {

-	if (pent->refcnt > 0 && (*comp) (pent, prgb))

-	{

-	    switch (channel)

-	    {

-	    case REDMAP:

-		pixel <<= pmap->pVisual->offsetRed;

-		break;

-	    case GREENMAP:

-		pixel <<= pmap->pVisual->offsetGreen;

-		break;

-	    case BLUEMAP:

-		pixel <<= pmap->pVisual->offsetBlue;

-		break;

-	    default: /* PSEUDOMAP */

-		break;

-	    }

-	    *pPixel = pixel;

-	}

-    }

-}

-

-/* Tries to find a color in pmap that exactly matches the one requested in prgb

- * if it can't it allocates one.

- * Starts looking at pentFirst + *pPixel, so if you want a specific pixel,

- * load *pPixel with that value, otherwise set it to 0

- */

-int

-FindColor (ColormapPtr pmap, EntryPtr pentFirst, int size, xrgb *prgb, 

-           Pixel *pPixel, int channel, int client, 

-           ColorCompareProcPtr comp)

-{

-    EntryPtr	pent;

-    Bool	foundFree;

-    Pixel	pixel, Free = 0;

-    int		npix, count, *nump = NULL;

-    Pixel	**pixp = NULL, *ppix;

-    xColorItem	def;

-

-    foundFree = FALSE;

-

-    if((pixel = *pPixel) >= size)

-	pixel = 0;

-    /* see if there is a match, and also look for a free entry */

-    for (pent = pentFirst + pixel, count = size; --count >= 0; )

-    {

-        if (pent->refcnt > 0)

-	{

-    	    if ((*comp) (pent, prgb))

-	    {

-		if (client >= 0)

-		    pent->refcnt++;

-		*pPixel = pixel;

-		switch(channel)

-		{

-		  case REDMAP:

-		    *pPixel <<= pmap->pVisual->offsetRed;

-		  case PSEUDOMAP:

-		    break;

-		  case GREENMAP:

-		    *pPixel <<= pmap->pVisual->offsetGreen;

-		    break;

-		  case BLUEMAP:

-		    *pPixel <<= pmap->pVisual->offsetBlue;

-		    break;

-		}

-		goto gotit;

-    	    }

-        }

-	else if (!foundFree && pent->refcnt == 0)

-	{

-	    Free = pixel;

-	    foundFree = TRUE;

-	    /* If we're initializing the colormap, then we are looking for

-	     * the first free cell we can find, not to minimize the number

-	     * of entries we use.  So don't look any further. */

-	    if(pmap->flags & BeingCreated)

-		break;

-	}

-	pixel++;

-	if(pixel >= size)

-	{

-	    pent = pentFirst;

-	    pixel = 0;

-	}

-	else

-	    pent++;

-    }

-

-    /* If we got here, we didn't find a match.  If we also didn't find

-     * a free entry, we're out of luck.  Otherwise, we'll usurp a free

-     * entry and fill it in */

-    if (!foundFree)

-	return (BadAlloc);

-    pent = pentFirst + Free;

-    pent->fShared = FALSE;

-    pent->refcnt = (client >= 0) ? 1 : AllocTemporary;

-

-    switch (channel)

-    {

-      case PSEUDOMAP:

-        pent->co.local.red = prgb->red;

-        pent->co.local.green = prgb->green;

-        pent->co.local.blue = prgb->blue;

-        def.red = prgb->red;

-	def.green = prgb->green;

-	def.blue = prgb->blue;

-	def.flags = (DoRed|DoGreen|DoBlue);

-	if (client >= 0)

-	    pmap->freeRed--;

-	def.pixel = Free;

-	break;

-

-      case REDMAP:

-        pent->co.local.red = prgb->red;

-        def.red = prgb->red;

-	def.green = pmap->green[0].co.local.green;

-	def.blue = pmap->blue[0].co.local.blue;

-	def.flags = DoRed;

-	if (client >= 0)

-	    pmap->freeRed--;

-	def.pixel = Free << pmap->pVisual->offsetRed;

-	break;

-

-      case GREENMAP:

-	pent->co.local.green = prgb->green;

-	def.red = pmap->red[0].co.local.red;

-        def.green = prgb->green;

-	def.blue = pmap->blue[0].co.local.blue;

-	def.flags = DoGreen;

-	if (client >= 0)

-	    pmap->freeGreen--;

-	def.pixel = Free << pmap->pVisual->offsetGreen;

-	break;

-

-      case BLUEMAP:

-	pent->co.local.blue = prgb->blue;

-	def.red = pmap->red[0].co.local.red;

-	def.green = pmap->green[0].co.local.green;

-	def.blue = prgb->blue;

-	def.flags = DoBlue;

-	if (client >= 0)

-	    pmap->freeBlue--;

-	def.pixel = Free << pmap->pVisual->offsetBlue;

-	break;

-    }

-    (*pmap->pScreen->StoreColors) (pmap, 1, &def);

-    pixel = Free;	

-    *pPixel = def.pixel;

-

-gotit:

-    if (pmap->flags & BeingCreated || client == -1)

-	return(Success);

-    /* Now remember the pixel, for freeing later */

-    switch (channel)

-    {

-      case PSEUDOMAP:

-      case REDMAP:

-	nump = pmap->numPixelsRed;

-	pixp = pmap->clientPixelsRed;

-	break;

-

-      case GREENMAP:

-	nump = pmap->numPixelsGreen;

-	pixp = pmap->clientPixelsGreen;

-	break;

-

-      case BLUEMAP:

-	nump = pmap->numPixelsBlue;

-	pixp = pmap->clientPixelsBlue;

-	break;

-    }

-    npix = nump[client];

-    ppix = (Pixel *) realloc(pixp[client], (npix + 1) * sizeof(Pixel));

-    if (!ppix)

-    {

-	pent->refcnt--;

-	if (!pent->fShared)

-	    switch (channel)

-	    {

-	      case PSEUDOMAP:

-	      case REDMAP:

-		pmap->freeRed++;

-		break;

-	      case GREENMAP:

-		pmap->freeGreen++;

-		break;

-	      case BLUEMAP:

-		pmap->freeBlue++;

-		break;

-	    }

-	return(BadAlloc);

-    }

-    ppix[npix] = pixel;

-    pixp[client] = ppix;

-    nump[client]++;

-

-    return(Success);

-}

-

-/* Comparison functions -- passed to FindColor to determine if an

- * entry is already the color we're looking for or not */

-static int

-AllComp (EntryPtr pent, xrgb *prgb)

-{

-    if((pent->co.local.red == prgb->red) &&

-       (pent->co.local.green == prgb->green) &&

-       (pent->co.local.blue == prgb->blue) )

-       return (1);

-    return (0);

-}

-

-static int

-RedComp (EntryPtr pent, xrgb *prgb)

-{

-    if (pent->co.local.red == prgb->red) 

-	return (1);

-    return (0);

-}

-

-static int

-GreenComp (EntryPtr pent, xrgb *prgb)

-{

-    if (pent->co.local.green == prgb->green) 

-	return (1);

-    return (0);

-}

-

-static int

-BlueComp (EntryPtr pent, xrgb *prgb)

-{

-    if (pent->co.local.blue == prgb->blue) 

-	return (1);

-    return (0);

-}

-

-

-/* Read the color value of a cell */

-

-int

-QueryColors (ColormapPtr pmap, int count, Pixel *ppixIn, xrgb *prgbList, ClientPtr client)

-{

-    Pixel	*ppix, pixel;

-    xrgb	*prgb;

-    VisualPtr	pVisual;

-    EntryPtr	pent;

-    Pixel	i;

-    int		errVal = Success;

-

-    pVisual = pmap->pVisual;

-    if ((pmap->class | DynamicClass) == DirectColor)

-    {

-	int numred, numgreen, numblue;

-	Pixel rgbbad;

-

-	numred = NUMRED(pVisual);

-	numgreen = NUMGREEN(pVisual);

-	numblue = NUMBLUE(pVisual);

-	rgbbad = ~RGBMASK(pVisual);

-	for( ppix = ppixIn, prgb = prgbList; --count >= 0; ppix++, prgb++)

-	{

-	    pixel = *ppix;

-	    if (pixel & rgbbad) {

-		client->errorValue = pixel;

-		errVal =  BadValue;

-		continue;

-	    }

-	    i  = (pixel & pVisual->redMask) >> pVisual->offsetRed;

-	    if (i >= numred)

-	    {

-		client->errorValue = pixel;

-		errVal =  BadValue;

-		continue;

-	    }

-	    prgb->red = pmap->red[i].co.local.red;

-	    i  = (pixel & pVisual->greenMask) >> pVisual->offsetGreen;

-	    if (i >= numgreen)

-	    {

-		client->errorValue = pixel;

-		errVal =  BadValue;

-		continue;

-	    }

-	    prgb->green = pmap->green[i].co.local.green;

-	    i  = (pixel & pVisual->blueMask) >> pVisual->offsetBlue;

-	    if (i >= numblue)

-	    {

-		client->errorValue = pixel;

-		errVal =  BadValue;

-		continue;

-	    }

-	    prgb->blue = pmap->blue[i].co.local.blue;

-	}

-    }

-    else

-    {

-	for( ppix = ppixIn, prgb = prgbList; --count >= 0; ppix++, prgb++)

-	{

-	    pixel = *ppix;

-	    if (pixel >= pVisual->ColormapEntries)

-	    {

-		client->errorValue = pixel;

-		errVal = BadValue;

-	    }

-	    else

-	    {

-		pent = (EntryPtr)&pmap->red[pixel];

-		if (pent->fShared)

-		{

-		    prgb->red = pent->co.shco.red->color;

-		    prgb->green = pent->co.shco.green->color;

-		    prgb->blue = pent->co.shco.blue->color;

-		}

-		else

-		{

-		    prgb->red = pent->co.local.red;

-		    prgb->green = pent->co.local.green;

-		    prgb->blue = pent->co.local.blue;

-		}

-	    }

-	}

-    }

-    return (errVal);

-}

-

-static void

-FreePixels(ColormapPtr pmap, int client)

-{

-    Pixel *ppix, *ppixStart;

-    int n;

-    int	class;

-

-    class = pmap->class;

-    ppixStart = pmap->clientPixelsRed[client];

-    if (class & DynamicClass)

-    {

-	n = pmap->numPixelsRed[client];

-	for (ppix = ppixStart; --n >= 0; )

-	{

-	    FreeCell(pmap, *ppix, REDMAP);

-	    ppix++;

-	}

-    }

-

-    free(ppixStart);

-    pmap->clientPixelsRed[client] = (Pixel *) NULL;

-    pmap->numPixelsRed[client] = 0;

-    if ((class | DynamicClass) == DirectColor) 

-    {

-        ppixStart = pmap->clientPixelsGreen[client];

-	if (class & DynamicClass)

-	    for (ppix = ppixStart, n = pmap->numPixelsGreen[client]; --n >= 0;)

-		FreeCell(pmap, *ppix++, GREENMAP);

-	free(ppixStart);

-	pmap->clientPixelsGreen[client] = (Pixel *) NULL;

-	pmap->numPixelsGreen[client] = 0;

-

-        ppixStart = pmap->clientPixelsBlue[client];

-	if (class & DynamicClass)

-	    for (ppix = ppixStart, n = pmap->numPixelsBlue[client]; --n >= 0; )

-		FreeCell(pmap, *ppix++, BLUEMAP);

-	free(ppixStart);

-	pmap->clientPixelsBlue[client] = (Pixel *) NULL;

-	pmap->numPixelsBlue[client] = 0;

-    }

-}

-

-/** 

- * Frees all of a client's colors and cells.

- *

- *  \param value  must conform to DeleteType

- *  \unused fakeid

- */

-int

-FreeClientPixels (pointer value, XID fakeid)

-{

-    pointer pmap;

-    colorResource *pcr = value;

-    int rc;

-

-    rc = dixLookupResourceByType(&pmap, pcr->mid, RT_COLORMAP, serverClient,

-				 DixRemoveAccess);

-    if (rc == Success)

-	FreePixels((ColormapPtr)pmap, pcr->client);

-    free(pcr);

-    return Success;

-}

-

-int

-AllocColorCells (int client, ColormapPtr pmap, int colors, int planes, 

-                 Bool contig, Pixel *ppix, Pixel *masks)

-{

-    Pixel	rmask, gmask, bmask, *ppixFirst, r, g, b;

-    int		n, class;

-    int		ok;

-    int		oldcount;

-    colorResource *pcr = (colorResource *)NULL;

-

-    class = pmap->class;

-    if (!(class & DynamicClass))

-	return (BadAlloc); /* Shouldn't try on this type */

-    oldcount = pmap->numPixelsRed[client];

-    if (pmap->class == DirectColor)

-	oldcount += pmap->numPixelsGreen[client] + pmap->numPixelsBlue[client];

-    if (!oldcount && (CLIENT_ID(pmap->mid) != client))

-    {

-	pcr = malloc(sizeof(colorResource));

-	if (!pcr)

-	    return (BadAlloc);

-    }

-

-    if (pmap->class == DirectColor)

-    {

-        ok = AllocDirect (client, pmap, colors, planes, planes, planes,

-			  contig, ppix, &rmask, &gmask, &bmask);

-	if(ok == Success)

-	{

-	    for (r = g = b = 1, n = planes; --n >= 0; r += r, g += g, b += b)

-	    {

-		while(!(rmask & r))

-		    r += r;

-		while(!(gmask & g))

-		    g += g;

-		while(!(bmask & b))

-		    b += b;

-		*masks++ = r | g | b;

-	    }

-	}

-    }

-    else

-    {

-        ok = AllocPseudo (client, pmap, colors, planes, contig, ppix, &rmask,

-			  &ppixFirst);

-	if(ok == Success)

-	{

-	    for (r = 1, n = planes; --n >= 0; r += r)

-	    {

-		while(!(rmask & r))

-		    r += r;

-		*masks++ = r;

-	    }

-	}

-    }

-

-    /* if this is the client's first pixels in this colormap, tell the

-     * resource manager that the client has pixels in this colormap which

-     * should be freed when the client dies */

-    if ((ok == Success) && pcr)

-    {

-	pcr->mid = pmap->mid;

-	pcr->client = client;

-	if (!AddResource(FakeClientID(client), RT_CMAPENTRY, (pointer)pcr))

-	    ok = BadAlloc;

-    } else if (pcr)

-	free(pcr);

-

-    return (ok);

-}

-

-

-int

-AllocColorPlanes (int client, ColormapPtr pmap, int colors, 

-                  int r, int g, int b, Bool contig, Pixel *pixels, 

-                  Pixel *prmask, Pixel *pgmask, Pixel *pbmask)

-{

-    int		ok;

-    Pixel	mask, *ppixFirst;

-    Pixel shift;

-    int i;

-    int		class;

-    int		oldcount;

-    colorResource *pcr = (colorResource *)NULL;

-

-    class = pmap->class;

-    if (!(class & DynamicClass))

-	return (BadAlloc); /* Shouldn't try on this type */

-    oldcount = pmap->numPixelsRed[client];

-    if (class == DirectColor)

-	oldcount += pmap->numPixelsGreen[client] + pmap->numPixelsBlue[client];

-    if (!oldcount && (CLIENT_ID(pmap->mid) != client))

-    {

-	pcr = malloc(sizeof(colorResource));

-	if (!pcr)

-	    return (BadAlloc);

-    }

-

-    if (class == DirectColor)

-    {

-        ok = AllocDirect (client, pmap, colors, r, g, b, contig, pixels,

-			  prmask, pgmask, pbmask);

-    }

-    else

-    {

-	/* Allocate the proper pixels */

-	/* XXX This is sort of bad, because of contig is set, we force all

-	 * r + g + b bits to be contiguous.  Should only force contiguity

-	 * per mask 

-	 */

-        ok = AllocPseudo (client, pmap, colors, r + g + b, contig, pixels,

-			  &mask, &ppixFirst);

-

-	if(ok == Success)

-	{

-	    /* now split that mask into three */

-	    *prmask = *pgmask = *pbmask = 0;

-	    shift = 1;

-	    for (i = r; --i >= 0; shift += shift)

-	    {

-		while (!(mask & shift))

-		    shift += shift;

-		*prmask |= shift;

-	    }

-	    for (i = g; --i >= 0; shift += shift)

-	    {

-		while (!(mask & shift))

-		    shift += shift;

-		*pgmask |= shift;

-	    }

-	    for (i = b; --i >= 0; shift += shift)

-	    {

-		while (!(mask & shift))

-		    shift += shift;

-		*pbmask |= shift;

-	    }

-

-	    /* set up the shared color cells */

-	    if (!AllocShared(pmap, pixels, colors, r, g, b,

-			     *prmask, *pgmask, *pbmask, ppixFirst))

-	    {

-		(void)FreeColors(pmap, client, colors, pixels, mask);

-		ok = BadAlloc;

-	    }

-	}

-    }

-

-    /* if this is the client's first pixels in this colormap, tell the

-     * resource manager that the client has pixels in this colormap which

-     * should be freed when the client dies */

-    if ((ok == Success) && pcr)

-    {

-	pcr->mid = pmap->mid;

-	pcr->client = client;

-	if (!AddResource(FakeClientID(client), RT_CMAPENTRY, (pointer)pcr))

-	    ok = BadAlloc;

-    } else if (pcr)

-	free(pcr);

-

-    return (ok);

-}

-

-static int

-AllocDirect (int client, ColormapPtr pmap, int c, int r, int g, int b, Bool contig, 

-             Pixel *pixels, Pixel *prmask, Pixel *pgmask, Pixel *pbmask)

-{

-    Pixel	*ppixRed, *ppixGreen, *ppixBlue;

-    Pixel	*ppix, *pDst, *p;

-    int		npix, npixR, npixG, npixB;

-    Bool	okR, okG, okB;

-    Pixel	*rpix = 0, *gpix = 0, *bpix = 0;

-

-    npixR = c << r;

-    npixG = c << g;

-    npixB = c << b;

-    if ((r >= 32) || (g >= 32) || (b >= 32) ||

-	(npixR > pmap->freeRed) || (npixR < c) ||

-	(npixG > pmap->freeGreen) || (npixG < c) ||

-	(npixB > pmap->freeBlue) || (npixB < c))

-	return BadAlloc;

-

-    /* start out with empty pixels */

-    for(p = pixels; p < pixels + c; p++)

-	*p = 0;

-

-    ppixRed = malloc(npixR * sizeof(Pixel));

-    ppixGreen = malloc(npixG * sizeof(Pixel));

-    ppixBlue = malloc(npixB * sizeof(Pixel));

-    if (!ppixRed || !ppixGreen || !ppixBlue)

-    {

-	if (ppixBlue) free(ppixBlue);

-	if (ppixGreen) free(ppixGreen);

-	if (ppixRed) free(ppixRed);

-	return(BadAlloc);

-    }

-

-    okR = AllocCP(pmap, pmap->red, c, r, contig, ppixRed, prmask);

-    okG = AllocCP(pmap, pmap->green, c, g, contig, ppixGreen, pgmask);

-    okB = AllocCP(pmap, pmap->blue, c, b, contig, ppixBlue, pbmask);

-

-    if (okR && okG && okB)

-    {

-	rpix = (Pixel *) realloc(pmap->clientPixelsRed[client],

-				  (pmap->numPixelsRed[client] + (c << r)) *

-				  sizeof(Pixel));

-	if (rpix)

-	    pmap->clientPixelsRed[client] = rpix;

-	gpix = (Pixel *) realloc(pmap->clientPixelsGreen[client],

-				  (pmap->numPixelsGreen[client] + (c << g)) *

-				  sizeof(Pixel));

-	if (gpix)

-	    pmap->clientPixelsGreen[client] = gpix;

-	bpix = (Pixel *) realloc(pmap->clientPixelsBlue[client],

-				  (pmap->numPixelsBlue[client] + (c << b)) *

-				  sizeof(Pixel));

-	if (bpix)

-	    pmap->clientPixelsBlue[client] = bpix;

-    }

-

-    if (!okR || !okG || !okB || !rpix || !gpix || !bpix)

-    {

-	if (okR)

-	    for(ppix = ppixRed, npix = npixR; --npix >= 0; ppix++)

-		pmap->red[*ppix].refcnt = 0;

-	if (okG)

-	    for(ppix = ppixGreen, npix = npixG; --npix >= 0; ppix++)

-		pmap->green[*ppix].refcnt = 0;

-	if (okB)

-	    for(ppix = ppixBlue, npix = npixB; --npix >= 0; ppix++)

-		pmap->blue[*ppix].refcnt = 0;

-	free(ppixBlue);

-	free(ppixGreen);

-	free(ppixRed);

-	return(BadAlloc);

-    }

-

-    *prmask <<= pmap->pVisual->offsetRed;

-    *pgmask <<= pmap->pVisual->offsetGreen;

-    *pbmask <<= pmap->pVisual->offsetBlue;

-

-    ppix = rpix + pmap->numPixelsRed[client];

-    for (pDst = pixels, p = ppixRed; p < ppixRed + npixR; p++)

-    {

-	*ppix++ = *p;

-	if(p < ppixRed + c)

-	    *pDst++ |= *p << pmap->pVisual->offsetRed;

-    }

-    pmap->numPixelsRed[client] += npixR;

-    pmap->freeRed -= npixR;

-

-    ppix = gpix + pmap->numPixelsGreen[client];

-    for (pDst = pixels, p = ppixGreen; p < ppixGreen + npixG; p++)

-    {

-	*ppix++ = *p;

-	if(p < ppixGreen + c)

-	    *pDst++ |= *p << pmap->pVisual->offsetGreen;

-    }

-    pmap->numPixelsGreen[client] += npixG;

-    pmap->freeGreen -= npixG;

-

-    ppix = bpix + pmap->numPixelsBlue[client];

-    for (pDst = pixels, p = ppixBlue; p < ppixBlue + npixB; p++)

-    {

-	*ppix++ = *p;

-	if(p < ppixBlue + c)

-	    *pDst++ |= *p << pmap->pVisual->offsetBlue;

-    }

-    pmap->numPixelsBlue[client] += npixB;

-    pmap->freeBlue -= npixB;

-

-

-    for (pDst = pixels; pDst < pixels + c; pDst++)

-	*pDst |= ALPHAMASK(pmap->pVisual);

-

-    free(ppixBlue);

-    free(ppixGreen);

-    free(ppixRed);

-

-    return (Success);

-}

-

-static int

-AllocPseudo (int client, ColormapPtr pmap, int c, int r, Bool contig, 

-             Pixel *pixels, Pixel *pmask, Pixel **pppixFirst)

-{

-    Pixel	*ppix, *p, *pDst, *ppixTemp;

-    int		npix;

-    Bool	ok;

-

-    npix = c << r;

-    if ((r >= 32) || (npix > pmap->freeRed) || (npix < c))

-	return(BadAlloc);

-    if(!(ppixTemp = malloc(npix * sizeof(Pixel))))

-	return(BadAlloc);

-    ok = AllocCP(pmap, pmap->red, c, r, contig, ppixTemp, pmask);

-

-    if (ok)

-    {

-

-	/* all the allocated pixels are added to the client pixel list,

-	 * but only the unique ones are returned to the client */

-	ppix = (Pixel *)realloc(pmap->clientPixelsRed[client],

-			 (pmap->numPixelsRed[client] + npix) * sizeof(Pixel));

-	if (!ppix)

-	{

-	    for (p = ppixTemp; p < ppixTemp + npix; p++)

-		pmap->red[*p].refcnt = 0;

-	    return (BadAlloc);

-	}

-	pmap->clientPixelsRed[client] = ppix;

-	ppix += pmap->numPixelsRed[client];

-	*pppixFirst = ppix;

-	pDst = pixels;

-	for (p = ppixTemp; p < ppixTemp + npix; p++)

-	{

-	    *ppix++ = *p;

-	    if(p < ppixTemp + c)

-	        *pDst++ = *p;

-	}

-	pmap->numPixelsRed[client] += npix;

-	pmap->freeRed -= npix;

-    }

-    free(ppixTemp);

-    return (ok ? Success : BadAlloc);

-}

-

-/* Allocates count << planes pixels from colormap pmap for client. If

- * contig, then the plane mask is made of consecutive bits.  Returns

- * all count << pixels in the array pixels. The first count of those

- * pixels are the unique pixels.  *pMask has the mask to Or with the

- * unique pixels to get the rest of them.

- *

- * Returns True iff all pixels could be allocated 

- * All cells allocated will have refcnt set to AllocPrivate and shared to FALSE

- * (see AllocShared for why we care)

- */

-static Bool

-AllocCP (ColormapPtr pmap, EntryPtr pentFirst, int count, int planes, 

-         Bool contig, Pixel *pixels, Pixel *pMask)

-{

-    EntryPtr	ent;

-    Pixel	pixel, base, entries, maxp, save;

-    int		dplanes, found;

-    Pixel	*ppix;

-    Pixel	mask;

-    Pixel	finalmask;

-

-    dplanes = pmap->pVisual->nplanes;

-

-    /* Easy case.  Allocate pixels only */

-    if (planes == 0)

-    {

-        /* allocate writable entries */

-	ppix = pixels;

-        ent = pentFirst;

-        pixel = 0;

-        while (--count >= 0)

-	{

-            /* Just find count unallocated cells */

-    	    while (ent->refcnt)

-	    {

-    	        ent++;

-    	        pixel++;

-    	    }

-    	    ent->refcnt = AllocPrivate;

-    	    *ppix++ = pixel;

-	    ent->fShared = FALSE;

-        }

-        *pMask = 0;

-        return (TRUE);

-    }

-    else if (planes > dplanes)

-    {

-	return (FALSE);

-    }

-

-    /* General case count pixels * 2 ^ planes cells to be allocated */

-

-    /* make room for new pixels */

-    ent = pentFirst;

-

-    /* first try for contiguous planes, since it's fastest */

-    for (mask = (((Pixel)1) << planes) - 1, base = 1, dplanes -= (planes - 1);

-         --dplanes >= 0;

-         mask += mask, base += base)

-    {

-        ppix = pixels;

-        found = 0;

-        pixel = 0;

-        entries = pmap->pVisual->ColormapEntries - mask;

-        while (pixel < entries)

-	{

-    	    save = pixel;

-    	    maxp = pixel + mask + base;

-    	    /* check if all are free */

-    	    while (pixel != maxp && ent[pixel].refcnt == 0)

-    	        pixel += base;

-	    if (pixel == maxp)

-		{

-		    /* this one works */

-		    *ppix++ = save;

-		    found++;

-		    if (found == count)

-		    {

-			/* found enough, allocate them all */

-			while (--count >= 0)

-			{

-			    pixel = pixels[count];

-			    maxp = pixel + mask;

-			    while (1)

-			    {

-				ent[pixel].refcnt = AllocPrivate;

-				ent[pixel].fShared = FALSE;

-				if (pixel == maxp)

-				    break;

-				pixel += base;

-				*ppix++ = pixel;

-			    }

-			}

-			*pMask = mask;

-			return (TRUE);

-		    }

-		}

-    	    pixel = save + 1;

-    	    if (pixel & mask)

-    	        pixel += mask;

-        }

-    }

-

-    dplanes = pmap->pVisual->nplanes;

-    if (contig || planes == 1 || dplanes < 3)

-	return (FALSE);

-

-    /* this will be very slow for large maps, need a better algorithm */

-

-    /*

-       we can generate the smallest and largest numbers that fits in dplanes

-       bits and contain exactly planes bits set as follows. First, we need to

-       check that it is possible to generate such a mask at all.

-       (Non-contiguous masks need one more bit than contiguous masks). Then

-       the smallest such mask consists of the rightmost planes-1 bits set, then

-       a zero, then a one in position planes + 1. The formula is

-         (3 << (planes-1)) -1

-       The largest such masks consists of the leftmost planes-1 bits set, then

-       a zero, then a one bit in position dplanes-planes-1. If dplanes is

-       smaller than 32 (the number of bits in a word) then the formula is:

-         (1<<dplanes) - (1<<(dplanes-planes+1) + (1<<dplanes-planes-1)

-       If dplanes = 32, then we can't calculate (1<<dplanes) and we have

-       to use:

-         ( (1<<(planes-1)) - 1) << (dplanes-planes+1) + (1<<(dplanes-planes-1))

-	  

-	  << Thank you, Loretta>>>

-

-    */

-

-    finalmask =

-        (((((Pixel)1)<<(planes-1)) - 1) << (dplanes-planes+1)) +

-	  (((Pixel)1)<<(dplanes-planes-1));

-    for (mask = (((Pixel)3) << (planes -1)) - 1; mask <= finalmask; mask++)

-    {

-        /* next 3 magic statements count number of ones (HAKMEM #169) */

-        pixel = (mask >> 1) & 033333333333;

-        pixel = mask - pixel - ((pixel >> 1) & 033333333333);

-        if ((((pixel + (pixel >> 3)) & 030707070707) % 077) != planes)

-    	    continue;

-        ppix = pixels;

-        found = 0;

-        entries = pmap->pVisual->ColormapEntries - mask;

-        base = lowbit (mask);

-        for (pixel = 0; pixel < entries; pixel++)

-	{

-	    if (pixel & mask)

-	        continue;

-	    maxp = 0;

-	    /* check if all are free */

-	    while (ent[pixel + maxp].refcnt == 0)

-	    {

-		GetNextBitsOrBreak(maxp, mask, base);

-	    }

-	    if ((maxp < mask) || (ent[pixel + mask].refcnt != 0))

-		continue;

-	    /* this one works */

-	    *ppix++ = pixel;

-	    found++;

-	    if (found < count)

-		continue;

-	    /* found enough, allocate them all */

-	    while (--count >= 0)

-	    {

-		pixel = (pixels)[count];

-		maxp = 0;

-		while (1)

-		{

-		    ent[pixel + maxp].refcnt = AllocPrivate;

-		    ent[pixel + maxp].fShared = FALSE;

-		    GetNextBitsOrBreak(maxp, mask, base);

-		    *ppix++ = pixel + maxp;

-		}

-	    }

-

-	    *pMask = mask;

-	    return (TRUE);

-	}

-    }

-    return (FALSE);

-}

-

-/**

- *

- *  \param ppixFirst  First of the client's new pixels

- */

-static Bool

-AllocShared (ColormapPtr pmap, Pixel *ppix, int c, int r, int g, int b, 

-             Pixel rmask, Pixel gmask, Pixel bmask, Pixel *ppixFirst)

-{

-    Pixel	*pptr, *cptr;

-    int		npix, z, npixClientNew, npixShared;

-    Pixel	basemask, base, bits, common;

-    SHAREDCOLOR *pshared, **ppshared, **psharedList;

-

-    npixClientNew = c << (r + g + b);

-    npixShared = (c << r) + (c << g) + (c << b);

-    psharedList = malloc(npixShared * sizeof(SHAREDCOLOR *));

-    if (!psharedList)

-	return FALSE;

-    ppshared = psharedList;

-    for (z = npixShared; --z >= 0; )

-    {

-	if (!(ppshared[z] = malloc(sizeof(SHAREDCOLOR))))

-	{

-	    for (z++ ; z < npixShared; z++)

-		free(ppshared[z]);

-	    return FALSE;

-	}

-    }

-    for(pptr = ppix, npix = c; --npix >= 0; pptr++)

-    {

-	basemask = ~(gmask | bmask);

-	common = *pptr & basemask;

-	if (rmask)

-	{

-	    bits = 0;

-	    base = lowbit (rmask);

-	    while(1)

-	    {

-		pshared = *ppshared++;

-		pshared->refcnt = 1 << (g + b);

-		for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)

-		{

-		    if ((*cptr & basemask) == (common | bits))

-		    {

-			pmap->red[*cptr].fShared = TRUE;

-			pmap->red[*cptr].co.shco.red = pshared;

-		    }

-		}

-		GetNextBitsOrBreak(bits, rmask, base);

-	    }

-	}

-	else

-	{

-	    pshared = *ppshared++;

-	    pshared->refcnt = 1 << (g + b);

-	    for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)

-	    {

-		if ((*cptr & basemask) == common)

-		{

-		    pmap->red[*cptr].fShared = TRUE;

-		    pmap->red[*cptr].co.shco.red = pshared;

-		}

-	    }

-	}

-	basemask = ~(rmask | bmask);

-	common = *pptr & basemask;

-	if (gmask)

-	{

-	    bits = 0;

-	    base = lowbit (gmask);

-	    while(1)

-	    {

-		pshared = *ppshared++;

-		pshared->refcnt = 1 << (r + b);

-		for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)

-		{

-		    if ((*cptr & basemask) == (common | bits))

-		    {

-			pmap->red[*cptr].co.shco.green = pshared;

-		    }

-		}

-		GetNextBitsOrBreak(bits, gmask, base);

-	    }

-	}

-	else

-	{

-	    pshared = *ppshared++;

-	    pshared->refcnt = 1 << (g + b);

-	    for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)

-	    {

-		if ((*cptr & basemask) == common)

-		{

-		    pmap->red[*cptr].co.shco.green = pshared;

-		}

-	    }

-	}

-	basemask = ~(rmask | gmask);

-	common = *pptr & basemask;

-	if (bmask)

-	{

-	    bits = 0;

-	    base = lowbit (bmask);

-	    while(1)

-	    {

-		pshared = *ppshared++;

-		pshared->refcnt = 1 << (r + g);

-		for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)

-		{

-		    if ((*cptr & basemask) == (common | bits))

-		    {

-			pmap->red[*cptr].co.shco.blue = pshared;

-		    }

-		}

-		GetNextBitsOrBreak(bits, bmask, base);

-	    }

-	}

-	else

-	{

-	    pshared = *ppshared++;

-	    pshared->refcnt = 1 << (g + b);

-	    for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)

-	    {

-		if ((*cptr & basemask) == common)

-		{

-		    pmap->red[*cptr].co.shco.blue = pshared;

-		}

-	    }

-	}

-    }

-    free(psharedList);

-    return TRUE;

-}

-

-

-/** FreeColors

- * Free colors and/or cells (probably slow for large numbers) 

- */

-int

-FreeColors (ColormapPtr pmap, int client, int count, Pixel *pixels, Pixel mask)

-{

-    int		rval, result, class;

-    Pixel	rmask;

-

-    class = pmap->class;

-    if (pmap->flags & AllAllocated)

-	return(BadAccess);

-    if ((class | DynamicClass) == DirectColor)

-    {

-	rmask = mask & RGBMASK(pmap->pVisual);

-        result = FreeCo(pmap, client, REDMAP, count, pixels,

-			mask & pmap->pVisual->redMask);

-	/* If any of the three calls fails, we must report that, if more

-	 * than one fails, it's ok that we report the last one */

-        rval = FreeCo(pmap, client, GREENMAP, count, pixels,

-		      mask & pmap->pVisual->greenMask);

-	if(rval != Success)

-	    result = rval;

-	rval = FreeCo(pmap, client, BLUEMAP, count, pixels,

-		      mask & pmap->pVisual->blueMask);

-	if(rval != Success)

-	    result = rval;

-    }

-    else

-    {

-	rmask = mask & ((((Pixel)1) << pmap->pVisual->nplanes) - 1);

-        result = FreeCo(pmap, client, PSEUDOMAP, count, pixels, rmask);

-    }

-    if ((mask != rmask) && count)

-    {

-	clients[client]->errorValue = *pixels | mask;

-	result = BadValue;

-    }

-    /* XXX should worry about removing any RT_CMAPENTRY resource */

-    return (result);

-}

-

-/**

- * Helper for FreeColors -- frees all combinations of *newpixels and mask bits

- * which the client has allocated in channel colormap cells of pmap.

- * doesn't change newpixels if it doesn't need to 

- *

- *  \param pmap   which colormap head

- *  \param color  which sub-map, eg, RED, BLUE, PSEUDO

- *  \param npixIn number of pixels passed in

- *  \param ppixIn number of base pixels

- *  \param mask   mask client gave us

- */

-static int

-FreeCo (ColormapPtr pmap, int client, int color, int npixIn, Pixel *ppixIn, Pixel mask)

-{

-    Pixel	*ppixClient, pixTest;

-    int		npixClient, npixNew, npix;

-    Pixel	bits, base, cmask, rgbbad;

-    Pixel	*pptr, *cptr;

-    int 	n, zapped;

-    int		errVal = Success;

-    int		offset, numents;

-

-    if (npixIn == 0)

-        return (errVal);

-    bits = 0;

-    zapped = 0;

-    base = lowbit (mask);

-

-    switch(color)

-    {

-      case REDMAP:

-	cmask = pmap->pVisual->redMask;

-	rgbbad = ~RGBMASK(pmap->pVisual);

-	offset = pmap->pVisual->offsetRed;

-	numents = (cmask >> offset) + 1;

-	ppixClient = pmap->clientPixelsRed[client];

-	npixClient = pmap->numPixelsRed[client];

-	break;

-      case GREENMAP:

-	cmask = pmap->pVisual->greenMask;

-	rgbbad = ~RGBMASK(pmap->pVisual);

-	offset = pmap->pVisual->offsetGreen;

-	numents = (cmask >> offset) + 1;

-	ppixClient = pmap->clientPixelsGreen[client];

-	npixClient = pmap->numPixelsGreen[client];

-	break;

-      case BLUEMAP:

-	cmask = pmap->pVisual->blueMask;

-	rgbbad = ~RGBMASK(pmap->pVisual);

-	offset = pmap->pVisual->offsetBlue;

-	numents = (cmask >> offset) + 1;

-	ppixClient = pmap->clientPixelsBlue[client];

-	npixClient = pmap->numPixelsBlue[client];

-	break;

-      default:	/* so compiler can see that everything gets initialized */

-      case PSEUDOMAP:

-	cmask = ~((Pixel)0);

-	rgbbad = 0;

-	offset = 0;

-	numents = pmap->pVisual->ColormapEntries;

-	ppixClient = pmap->clientPixelsRed[client];

-	npixClient = pmap->numPixelsRed[client];

-	break;

-    }

-

-

-    /* zap all pixels which match */

-    while (1)

-    {

-        /* go through pixel list */

-        for (pptr = ppixIn, n = npixIn; --n >= 0; pptr++)

-	{

-	    pixTest = ((*pptr | bits) & cmask) >> offset;

-	    if ((pixTest >= numents) || (*pptr & rgbbad))

-	    {

-		clients[client]->errorValue = *pptr | bits;

-		errVal = BadValue;

-		continue;

-	    }

-

-	    /* find match in client list */

-	    for (cptr = ppixClient, npix = npixClient;

-	         --npix >= 0 && *cptr != pixTest;

-		 cptr++) ;

-

-	    if (npix >= 0)

-	    {

-		if (pmap->class & DynamicClass)

-		{

-		    FreeCell(pmap, pixTest, color);

-		}

-		*cptr = ~((Pixel)0);

-		zapped++;

-	    }

-	    else

-		errVal = BadAccess;

-	}

-        /* generate next bits value */

-	GetNextBitsOrBreak(bits, mask, base);

-    }

-

-    /* delete freed pixels from client pixel list */

-    if (zapped)

-    {

-        npixNew = npixClient - zapped;

-        if (npixNew)

-	{

-	    /* Since the list can only get smaller, we can do a copy in

-	     * place and then realloc to a smaller size */

-    	    pptr = cptr = ppixClient;

-

-	    /* If we have all the new pixels, we don't have to examine the

-	     * rest of the old ones */

-	    for(npix = 0; npix < npixNew; cptr++)

-	    {

-    	        if (*cptr != ~((Pixel)0))

-		{

-    		    *pptr++ = *cptr;

-		    npix++;

-    	        }

-    	    }

-	    pptr = (Pixel *)realloc(ppixClient, npixNew * sizeof(Pixel));

-	    if (pptr)

-		ppixClient = pptr;

-	    npixClient = npixNew;

-        }

-	else

-	{

-	    npixClient = 0;

-	    free(ppixClient);

-    	    ppixClient = (Pixel *)NULL;

-	}

-	switch(color)

-	{

-	  case PSEUDOMAP:

-	  case REDMAP:

-	    pmap->clientPixelsRed[client] = ppixClient;

-	    pmap->numPixelsRed[client] = npixClient;

-	    break;

-	  case GREENMAP:

-	    pmap->clientPixelsGreen[client] = ppixClient;

-	    pmap->numPixelsGreen[client] = npixClient;

-	    break;

-	  case BLUEMAP:

-	    pmap->clientPixelsBlue[client] = ppixClient;

-	    pmap->numPixelsBlue[client] = npixClient;

-	    break;

-	}

-    }

-    return (errVal);

-}

-

-

-

-/* Redefine color values */

-int

-StoreColors (ColormapPtr pmap, int count, xColorItem *defs, ClientPtr client)

-{

-    Pixel 	pix;

-    xColorItem *pdef;

-    EntryPtr 	pent, pentT, pentLast;

-    VisualPtr	pVisual;

-    SHAREDCOLOR		*pred, *pgreen, *pblue;

-    int			n, ChgRed, ChgGreen, ChgBlue, idef;

-    int			class, errVal = Success;

-    int			ok;

-

-

-    class = pmap->class;

-    if(!(class & DynamicClass) && !(pmap->flags & BeingCreated))

-    {

-	return(BadAccess);

-    }

-    pVisual = pmap->pVisual;

-

-    idef = 0;

-    if((class | DynamicClass) == DirectColor)

-    {

-	int numred, numgreen, numblue;

-	Pixel rgbbad;

-

-	numred = NUMRED(pVisual);

-	numgreen = NUMGREEN(pVisual);

-	numblue = NUMBLUE(pVisual);

-	rgbbad = ~RGBMASK(pVisual);

-        for (pdef = defs, n = 0; n < count; pdef++, n++)

-	{

-	    ok = TRUE;

-            (*pmap->pScreen->ResolveColor)

-	        (&pdef->red, &pdef->green, &pdef->blue, pmap->pVisual);

-

-	    if (pdef->pixel & rgbbad)

-	    {

-		errVal = BadValue;

-		client->errorValue = pdef->pixel;

-		continue;

-	    }

-	    pix = (pdef->pixel & pVisual->redMask) >> pVisual->offsetRed;

-	    if (pix >= numred)

-	    {

-		errVal = BadValue;

-		ok = FALSE;

-	    }

-	    else if (pmap->red[pix].refcnt != AllocPrivate)

-	    {

-		errVal = BadAccess;

-		ok = FALSE;

-	    }

-	    else if (pdef->flags & DoRed)

-	    {

-		pmap->red[pix].co.local.red = pdef->red;

-	    }

-	    else

-	    {

-		pdef->red = pmap->red[pix].co.local.red;

-	    }

-

-	    pix = (pdef->pixel & pVisual->greenMask) >> pVisual->offsetGreen;

-	    if (pix >= numgreen)

-	    {

-		errVal = BadValue;

-		ok = FALSE;

-	    }

-	    else if (pmap->green[pix].refcnt != AllocPrivate)

-	    {

-		errVal = BadAccess;

-		ok = FALSE;

-	    }

-	    else if (pdef->flags & DoGreen)

-	    {

-		pmap->green[pix].co.local.green = pdef->green;

-	    }

-	    else

-	    {

-		pdef->green = pmap->green[pix].co.local.green;

-	    }

-

-	    pix = (pdef->pixel & pVisual->blueMask) >> pVisual->offsetBlue;

-	    if (pix >= numblue)

-	    {

-		errVal = BadValue;

-		ok = FALSE;

-	    }

-	    else if (pmap->blue[pix].refcnt != AllocPrivate)

-	    {

-		errVal = BadAccess;

-		ok = FALSE;

-	    }

-	    else if (pdef->flags & DoBlue)

-	    {

-		pmap->blue[pix].co.local.blue = pdef->blue;

-	    }

-	    else

-	    {

-		pdef->blue = pmap->blue[pix].co.local.blue;

-	    }

-	    /* If this is an o.k. entry, then it gets added to the list

-	     * to be sent to the hardware.  If not, skip it.  Once we've

-	     * skipped one, we have to copy all the others.

-	     */

-	    if(ok)

-	    {

-		if(idef != n)

-		    defs[idef] = defs[n];

-		idef++;

-	    } else

-		client->errorValue = pdef->pixel;

-	}

-    }

-    else

-    {

-        for (pdef = defs, n = 0; n < count; pdef++, n++)

-	{

-

-	    ok = TRUE;

-	    if (pdef->pixel >= pVisual->ColormapEntries)

-	    {

-		client->errorValue = pdef->pixel;

-	        errVal = BadValue;

-		ok = FALSE;

-	    }

-	    else if (pmap->red[pdef->pixel].refcnt != AllocPrivate)

-	    {

-		errVal = BadAccess;

-		ok = FALSE;

-	    }

-

-	    /* If this is an o.k. entry, then it gets added to the list

-	     * to be sent to the hardware.  If not, skip it.  Once we've

-	     * skipped one, we have to copy all the others.

-	     */

-	    if(ok)

-	    {

-		if(idef != n)

-		    defs[idef] = defs[n];

-		idef++;

-	    }

-	    else

-		continue;

-

-            (*pmap->pScreen->ResolveColor)

-	        (&pdef->red, &pdef->green, &pdef->blue, pmap->pVisual);

-

-	    pent = &pmap->red[pdef->pixel];

-

-	    if(pdef->flags & DoRed)

-	    {

-		if(pent->fShared)

-		{

-		    pent->co.shco.red->color = pdef->red;

-		    if (pent->co.shco.red->refcnt > 1)

-			ok = FALSE;

-		}

-		else

-		    pent->co.local.red = pdef->red;

-	    }

-	    else

-	    {

-		if(pent->fShared)

-		    pdef->red = pent->co.shco.red->color;

-		else

-		    pdef->red = pent->co.local.red;

-	    }

-	    if(pdef->flags & DoGreen)

-	    {

-		if(pent->fShared)

-		{

-		    pent->co.shco.green->color = pdef->green;

-		    if (pent->co.shco.green->refcnt > 1)

-			ok = FALSE;

-		}

-		else

-		    pent->co.local.green = pdef->green;

-	    }

-	    else

-	    {

-		if(pent->fShared)

-		    pdef->green = pent->co.shco.green->color;

-		else

-		    pdef->green = pent->co.local.green;

-	    }

-	    if(pdef->flags & DoBlue)

-	    {

-		if(pent->fShared)

-		{

-		    pent->co.shco.blue->color = pdef->blue;

-		    if (pent->co.shco.blue->refcnt > 1)

-			ok = FALSE;

-		}

-		else

-		    pent->co.local.blue = pdef->blue;

-	    }

-	    else

-	    {

-		if(pent->fShared)

-		    pdef->blue = pent->co.shco.blue->color;

-		else

-		    pdef->blue = pent->co.local.blue;

-	    }

-

-	    if(!ok)

-	    {

-                /* have to run through the colormap and change anybody who

-		 * shares this value */

-	        pred = pent->co.shco.red;

-	        pgreen = pent->co.shco.green;

-	        pblue = pent->co.shco.blue;

-	        ChgRed = pdef->flags & DoRed;

-	        ChgGreen = pdef->flags & DoGreen;

-	        ChgBlue = pdef->flags & DoBlue;

-	        pentLast = pmap->red + pVisual->ColormapEntries;

-

-	        for(pentT = pmap->red; pentT < pentLast; pentT++)

-		{

-		    if(pentT->fShared && (pentT != pent))

-		    {

-			xColorItem	defChg;

-

-			/* There are, alas, devices in this world too dumb

-			 * to read their own hardware colormaps.  Sick, but

-			 * true.  So we're going to be really nice and load

-			 * the xColorItem with the proper value for all the

-			 * fields.  We will only set the flags for those

-			 * fields that actually change.  Smart devices can

-			 * arrange to change only those fields.  Dumb devices

-			 * can rest assured that we have provided for them,

-			 * and can change all three fields */

-

-			defChg.flags = 0;

-			if(ChgRed && pentT->co.shco.red == pred)

-			{

-			    defChg.flags |= DoRed;

-			}

-			if(ChgGreen && pentT->co.shco.green == pgreen)

-			{

-			    defChg.flags |= DoGreen;

-			}

-			if(ChgBlue && pentT->co.shco.blue == pblue)

-			{

-			    defChg.flags |= DoBlue;

-			}

-			if(defChg.flags != 0)

-			{

-			    defChg.pixel = pentT - pmap->red;

-			    defChg.red = pentT->co.shco.red->color;

-			    defChg.green = pentT->co.shco.green->color;

-			    defChg.blue = pentT->co.shco.blue->color;

-			    (*pmap->pScreen->StoreColors) (pmap, 1, &defChg);

-			}

-		    }

-		}

-

-	    }

-	}

-    }

-    /* Note that we use idef, the count of acceptable entries, and not

-     * count, the count of proposed entries */

-    if (idef != 0)

-	( *pmap->pScreen->StoreColors) (pmap, idef, defs);

-    return (errVal);

-}

-

-int

-IsMapInstalled(Colormap map, WindowPtr pWin)

-{

-    Colormap	*pmaps;

-    int		imap, nummaps, found;

-

-    pmaps = malloc(pWin->drawable.pScreen->maxInstalledCmaps*sizeof(Colormap));

-    if(!pmaps)

-	return(FALSE);

-    nummaps = (*pWin->drawable.pScreen->ListInstalledColormaps)

-        (pWin->drawable.pScreen, pmaps);

-    found = FALSE;

-    for(imap = 0; imap < nummaps; imap++)

-    {

-	if(pmaps[imap] == map)

-	{

-	    found = TRUE;

-	    break;

-	}

-    }

-    free(pmaps);

-    return (found);

-}

-

-struct colormap_lookup_data {

-    ScreenPtr pScreen;

-    VisualPtr visuals;

-};

-

-static void _colormap_find_resource(pointer value, XID id,

-				    pointer cdata)

-{

-    struct colormap_lookup_data *cmap_data = cdata;

-    VisualPtr visuals = cmap_data->visuals;

-    ScreenPtr pScreen = cmap_data->pScreen;

-    ColormapPtr cmap = value;

-    int j;

-

-    if (pScreen != cmap->pScreen)

-	return;

-

-    j = cmap->pVisual - pScreen->visuals;

-    cmap->pVisual = &visuals[j];

-}

-

-/* something has realloced the visuals, instead of breaking

-   ABI fix it up here - glx and compsite did this wrong */

-Bool

-ResizeVisualArray(ScreenPtr pScreen, int new_visual_count,

-		  DepthPtr depth)

-{

-    struct colormap_lookup_data cdata;

-    int numVisuals;

-    VisualPtr visuals;

-    XID *vids, vid;

-    int first_new_vid, first_new_visual, i;

-

-    first_new_vid = depth->numVids;

-    first_new_visual = pScreen->numVisuals;

-

-    vids = realloc(depth->vids, (depth->numVids + new_visual_count) * sizeof(XID));

-    if (!vids)

-        return FALSE;

-

-    /* its realloced now no going back if we fail the next one */

-    depth->vids = vids;

-

-    numVisuals = pScreen->numVisuals + new_visual_count;

-    visuals = realloc(pScreen->visuals, numVisuals * sizeof(VisualRec));

-    if (!visuals) {

-	return FALSE;

-    }

-

-    cdata.visuals = visuals;

-    cdata.pScreen = pScreen;

-    FindClientResourcesByType(serverClient, RT_COLORMAP, _colormap_find_resource, &cdata);

-

-    pScreen->visuals = visuals;

-

-    for (i = 0; i < new_visual_count; i++) {

-	vid = FakeClientID(0);

-	pScreen->visuals[first_new_visual + i].vid = vid;

-	vids[first_new_vid + i] = vid;

-    }

-

-    depth->numVids += new_visual_count;

-    pScreen->numVisuals += new_visual_count;

-

-    return TRUE;

-}

+/***********************************************************
+
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xproto.h>
+#include <stdio.h>
+#include <string.h>
+#include <strings.h>
+#include "misc.h"
+#include "dix.h"
+#include "dixstruct.h"
+#include "colormapst.h"
+#include "os.h"
+#include "scrnintstr.h"
+#include "resource.h"
+#include "windowstr.h"
+#include "privates.h"
+#include "xace.h"
+
+static Pixel FindBestPixel(
+    EntryPtr /*pentFirst*/,
+    int /*size*/,
+    xrgb * /*prgb*/,
+    int /*channel*/
+);
+
+static int AllComp(
+    EntryPtr /*pent*/,
+    xrgb * /*prgb*/
+);
+
+static int RedComp(
+    EntryPtr /*pent*/,
+    xrgb * /*prgb*/
+);
+
+static int GreenComp(
+    EntryPtr /*pent*/,
+    xrgb * /*prgb*/
+);
+
+static int BlueComp(
+    EntryPtr /*pent*/,
+    xrgb * /*prgb*/
+);
+
+static void FreePixels(
+    ColormapPtr /*pmap*/,
+    int /*client*/
+);
+
+static void CopyFree(
+    int /*channel*/,
+    int /*client*/,
+    ColormapPtr /*pmapSrc*/,
+    ColormapPtr /*pmapDst*/
+);
+
+static void FreeCell(
+    ColormapPtr /*pmap*/,
+    Pixel /*i*/,
+    int /*channel*/
+);
+
+static void UpdateColors(
+    ColormapPtr /*pmap*/
+);
+
+static int AllocDirect(
+    int /*client*/,
+    ColormapPtr /*pmap*/,
+    int /*c*/,
+    int /*r*/,
+    int /*g*/,
+    int /*b*/,
+    Bool /*contig*/,
+    Pixel * /*pixels*/,
+    Pixel * /*prmask*/,
+    Pixel * /*pgmask*/,
+    Pixel * /*pbmask*/
+);
+
+static int AllocPseudo(
+    int /*client*/,
+    ColormapPtr /*pmap*/,
+    int /*c*/,
+    int /*r*/,
+    Bool /*contig*/,
+    Pixel * /*pixels*/,
+    Pixel * /*pmask*/,
+    Pixel ** /*pppixFirst*/
+);
+
+static Bool AllocCP(
+    ColormapPtr /*pmap*/,
+    EntryPtr /*pentFirst*/,
+    int /*count*/,
+    int /*planes*/,
+    Bool /*contig*/,
+    Pixel * /*pixels*/,
+    Pixel * /*pMask*/
+);
+
+static Bool AllocShared(
+    ColormapPtr /*pmap*/,
+    Pixel * /*ppix*/,
+    int /*c*/,
+    int /*r*/,
+    int /*g*/,
+    int /*b*/,
+    Pixel /*rmask*/,
+    Pixel /*gmask*/,
+    Pixel /*bmask*/,
+    Pixel * /*ppixFirst*/
+);
+
+static int FreeCo(
+    ColormapPtr /*pmap*/,
+    int /*client*/,
+    int /*color*/,
+    int /*npixIn*/,
+    Pixel * /*ppixIn*/,
+    Pixel /*mask*/
+);
+
+static int   TellNoMap(
+    WindowPtr	/*pwin*/,
+    Colormap 	* /*pmid*/
+);
+
+static void FindColorInRootCmap (
+    ColormapPtr	/* pmap */,
+    EntryPtr	/* pentFirst */,
+    int		/* size */,
+    xrgb*	/* prgb */,
+    Pixel*	/* pPixel */,
+    int		/* channel */,
+    ColorCompareProcPtr /* comp */
+);
+
+#define NUMRED(vis) ((vis->redMask >> vis->offsetRed) + 1)
+#define NUMGREEN(vis) ((vis->greenMask >> vis->offsetGreen) + 1)
+#define NUMBLUE(vis) ((vis->blueMask >> vis->offsetBlue) + 1)
+#if COMPOSITE
+#define ALPHAMASK(vis)	((vis)->nplanes < 32 ? 0 : \
+			 (CARD32) ~((vis)->redMask|(vis)->greenMask|(vis)->blueMask))
+#else
+#define ALPHAMASK(vis)	0
+#endif
+
+#define RGBMASK(vis) (vis->redMask | vis->greenMask | vis->blueMask | ALPHAMASK(vis))
+
+/* GetNextBitsOrBreak(bits, mask, base)  -- 
+ * (Suggestion: First read the macro, then read this explanation.
+ *
+ * Either generate the next value to OR in to a pixel or break out of this
+ * while loop 
+ *
+ * This macro is used when we're trying to generate all 2^n combinations of
+ * bits in mask.  What we're doing here is counting in binary, except that
+ * the bits we use to count may not be contiguous.  This macro will be
+ * called 2^n times, returning a different value in bits each time. Then
+ * it will cause us to break out of a surrounding loop. (It will always be
+ * called from within a while loop.)
+ * On call: mask is the value we want to find all the combinations for
+ * base has 1 bit set where the least significant bit of mask is set
+ *
+ * For example,if mask is 01010, base should be 0010 and we count like this:
+ * 00010 (see this isn't so hard), 
+ *     then we add base to bits and get 0100. (bits & ~mask) is (0100 & 0100) so
+ *      we add that to bits getting (0100 + 0100) =
+ * 01000 for our next value.
+ *      then we add 0010 to get 
+ * 01010 and we're done (easy as 1, 2, 3)
+ */
+#define GetNextBitsOrBreak(bits, mask, base)	\
+	    if((bits) == (mask)) 		\
+		break;		 		\
+	    (bits) += (base);		 	\
+	    while((bits) & ~(mask))		\
+		(bits) += ((bits) & ~(mask));	
+/* ID of server as client */
+#define SERVER_ID	0
+
+typedef struct _colorResource
+{
+	Colormap	mid;
+	int		client;
+} colorResource;
+
+/* Invariants:
+ * refcnt == 0 means entry is empty
+ * refcnt > 0 means entry is useable by many clients, so it can't be changed
+ * refcnt == AllocPrivate means entry owned by one client only
+ * fShared should only be set if refcnt == AllocPrivate, and only in red map
+ */
+
+
+/** 
+ * Create and initialize the color map 
+ * 
+ * \param mid    resource to use for this colormap
+ * \param alloc  1 iff all entries are allocated writable
+ */
+int
+CreateColormap (Colormap mid, ScreenPtr pScreen, VisualPtr pVisual, 
+                ColormapPtr *ppcmap, int alloc, int client)
+{
+    int		class, size;
+    unsigned long sizebytes;
+    ColormapPtr	pmap;
+    EntryPtr	pent;
+    int		i;
+    Pixel	*ppix, **pptr;
+
+    class = pVisual->class;
+    if(!(class & DynamicClass) && (alloc != AllocNone) && (client != SERVER_ID))
+	return (BadMatch);
+
+    size = pVisual->ColormapEntries;
+    sizebytes = (size * sizeof(Entry)) +
+		(MAXCLIENTS * sizeof(Pixel *)) +
+		(MAXCLIENTS * sizeof(int));
+    if ((class | DynamicClass) == DirectColor)
+	sizebytes *= 3;
+    sizebytes += sizeof(ColormapRec);
+    pmap = malloc(sizebytes);
+    if (!pmap)
+	return (BadAlloc);
+#if defined(_XSERVER64)
+    pmap->pad0 = 0;
+    pmap->pad1 = 0;
+#if (X_BYTE_ORDER == X_LITTLE_ENDIAN)
+    pmap->pad2 = 0;
+#endif
+#endif
+    pmap->red = (EntryPtr)((char *)pmap + sizeof(ColormapRec));    
+    sizebytes = size * sizeof(Entry);
+    pmap->clientPixelsRed = (Pixel **)((char *)pmap->red + sizebytes);
+    pmap->numPixelsRed = (int *)((char *)pmap->clientPixelsRed +
+				 (MAXCLIENTS * sizeof(Pixel *)));
+    pmap->mid = mid;
+    pmap->flags = 0; 	/* start out with all flags clear */
+    if(mid == pScreen->defColormap)
+	pmap->flags |= IsDefault;
+    pmap->pScreen = pScreen;
+    pmap->pVisual = pVisual;
+    pmap->class = class;
+    if ((class | DynamicClass) == DirectColor)
+	size = NUMRED(pVisual);
+    pmap->freeRed = size;
+    bzero ((char *) pmap->red, (int)sizebytes);
+    bzero((char *) pmap->numPixelsRed, MAXCLIENTS * sizeof(int));
+    for (pptr = &pmap->clientPixelsRed[MAXCLIENTS]; --pptr >= pmap->clientPixelsRed; )
+	*pptr = (Pixel *)NULL;
+    if (alloc == AllocAll)
+    {
+	if (class & DynamicClass)
+	    pmap->flags |= AllAllocated;
+	for (pent = &pmap->red[size - 1]; pent >= pmap->red; pent--)
+	    pent->refcnt = AllocPrivate;
+	pmap->freeRed = 0;
+	ppix = malloc(size * sizeof(Pixel));
+	if (!ppix)
+	{
+	    free(pmap);
+	    return (BadAlloc);
+	}
+	pmap->clientPixelsRed[client] = ppix;
+	for(i = 0; i < size; i++)
+	    ppix[i] = i;
+	pmap->numPixelsRed[client] = size;
+    }
+
+    if ((class | DynamicClass) == DirectColor)
+    {
+	pmap->freeGreen = NUMGREEN(pVisual);
+	pmap->green = (EntryPtr)((char *)pmap->numPixelsRed +
+				 (MAXCLIENTS * sizeof(int)));
+	pmap->clientPixelsGreen = (Pixel **)((char *)pmap->green + sizebytes);
+	pmap->numPixelsGreen = (int *)((char *)pmap->clientPixelsGreen +
+				       (MAXCLIENTS * sizeof(Pixel *)));
+	pmap->freeBlue = NUMBLUE(pVisual);
+	pmap->blue = (EntryPtr)((char *)pmap->numPixelsGreen +
+				(MAXCLIENTS * sizeof(int)));
+	pmap->clientPixelsBlue = (Pixel **)((char *)pmap->blue + sizebytes);
+	pmap->numPixelsBlue = (int *)((char *)pmap->clientPixelsBlue +
+				      (MAXCLIENTS * sizeof(Pixel *)));
+
+	bzero ((char *) pmap->green, (int)sizebytes);
+	bzero ((char *) pmap->blue, (int)sizebytes);
+
+	memmove((char *) pmap->clientPixelsGreen,
+		(char *) pmap->clientPixelsRed,
+	      MAXCLIENTS * sizeof(Pixel *));
+	memmove((char *) pmap->clientPixelsBlue,
+		(char *) pmap->clientPixelsRed,
+	      MAXCLIENTS * sizeof(Pixel *));
+	bzero((char *) pmap->numPixelsGreen, MAXCLIENTS * sizeof(int));
+	bzero((char *) pmap->numPixelsBlue, MAXCLIENTS * sizeof(int));
+
+	/* If every cell is allocated, mark its refcnt */
+	if (alloc == AllocAll)
+	{
+	    size = pmap->freeGreen;
+	    for(pent = &pmap->green[size-1]; pent >= pmap->green; pent--)
+		pent->refcnt = AllocPrivate;
+	    pmap->freeGreen = 0;
+	    ppix = malloc(size * sizeof(Pixel));
+	    if (!ppix)
+	    {
+		free(pmap->clientPixelsRed[client]);
+		free(pmap);
+		return(BadAlloc);
+	    }
+	    pmap->clientPixelsGreen[client] = ppix;
+	    for(i = 0; i < size; i++)
+		ppix[i] = i;
+	    pmap->numPixelsGreen[client] = size;
+
+	    size = pmap->freeBlue;
+	    for(pent = &pmap->blue[size-1]; pent >= pmap->blue; pent--)
+		pent->refcnt = AllocPrivate;
+	    pmap->freeBlue = 0;
+	    ppix = malloc(size * sizeof(Pixel));
+	    if (!ppix)
+	    {
+		free(pmap->clientPixelsGreen[client]);
+		free(pmap->clientPixelsRed[client]);
+		free(pmap);
+		return(BadAlloc);
+	    }
+	    pmap->clientPixelsBlue[client] = ppix;
+	    for(i = 0; i < size; i++)
+		ppix[i] = i;
+	    pmap->numPixelsBlue[client] = size;
+	}
+    }
+    pmap->devPrivates = NULL;
+    pmap->flags |= BeingCreated;
+
+    if (!AddResource(mid, RT_COLORMAP, (pointer)pmap))
+	return (BadAlloc);
+
+    /*  
+     * Security creation/labeling check
+     */
+    i = XaceHook(XACE_RESOURCE_ACCESS, clients[client], mid, RT_COLORMAP,
+		 pmap, RT_NONE, NULL, DixCreateAccess);
+    if (i != Success) {
+	FreeResource(mid, RT_NONE);
+	return i;
+    }
+
+    /* If the device wants a chance to initialize the colormap in any way,
+     * this is it.  In specific, if this is a Static colormap, this is the
+     * time to fill in the colormap's values */
+    if (!(*pScreen->CreateColormap)(pmap))
+    {
+	FreeResource (mid, RT_NONE);
+	return BadAlloc;
+    }
+    pmap->flags &= ~BeingCreated;
+    *ppcmap = pmap;
+    return (Success);
+}
+
+/**
+ *
+ * \param value  must conform to DeleteType
+ */
+int
+FreeColormap (pointer value, XID mid)
+{
+    int	i;
+    EntryPtr pent;
+    ColormapPtr	pmap = (ColormapPtr)value;
+
+    if(CLIENT_ID(mid) != SERVER_ID)
+    {
+        (*pmap->pScreen->UninstallColormap) (pmap);
+        WalkTree(pmap->pScreen, (VisitWindowProcPtr)TellNoMap, (pointer) &mid);
+    }
+
+    /* This is the device's chance to undo anything it needs to, especially
+     * to free any storage it allocated */
+    (*pmap->pScreen->DestroyColormap)(pmap);
+
+    if(pmap->clientPixelsRed)
+    {
+	for(i = 0; i < MAXCLIENTS; i++)
+	    free(pmap->clientPixelsRed[i]);
+    }
+
+    if ((pmap->class == PseudoColor) || (pmap->class == GrayScale))
+    {
+	for(pent = &pmap->red[pmap->pVisual->ColormapEntries - 1];
+	    pent >= pmap->red;
+	    pent--)
+	{
+	    if(pent->fShared)
+	    {
+		if (--pent->co.shco.red->refcnt == 0)
+		    free(pent->co.shco.red);
+		if (--pent->co.shco.green->refcnt == 0)
+		    free(pent->co.shco.green);
+		if (--pent->co.shco.blue->refcnt == 0)
+		    free(pent->co.shco.blue);
+	    }
+	}
+    }
+    if((pmap->class | DynamicClass) == DirectColor)
+    {
+        for(i = 0; i < MAXCLIENTS; i++)
+	{
+            free(pmap->clientPixelsGreen[i]);
+            free(pmap->clientPixelsBlue[i]);
+        }
+    }
+
+    dixFreePrivates(pmap->devPrivates);
+    free(pmap);
+    return(Success);
+}
+
+/* Tell window that pmid has disappeared */
+static int
+TellNoMap (WindowPtr pwin, Colormap *pmid)
+{
+    xEvent 	xE;
+
+    if (wColormap(pwin) == *pmid)
+    {
+	/* This should be call to DeliverEvent */
+	xE.u.u.type = ColormapNotify;
+	xE.u.colormap.window = pwin->drawable.id;
+	xE.u.colormap.colormap = None;
+	xE.u.colormap.new = TRUE;
+	xE.u.colormap.state = ColormapUninstalled;
+#ifdef PANORAMIX
+        if(noPanoramiXExtension || !pwin->drawable.pScreen->myNum)
+#endif
+	   DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);
+	if (pwin->optional) {
+	    pwin->optional->colormap = None;
+	    CheckWindowOptionalNeed (pwin);
+	}
+    }
+
+    return (WT_WALKCHILDREN);
+}
+
+/* Tell window that pmid got uninstalled */
+int
+TellLostMap (WindowPtr pwin, pointer value)
+{
+    Colormap 	*pmid = (Colormap *)value;
+    xEvent 	xE;
+
+#ifdef PANORAMIX
+    if(!noPanoramiXExtension && pwin->drawable.pScreen->myNum)
+	return WT_STOPWALKING;
+#endif
+    if (wColormap(pwin) == *pmid)
+    {
+	/* This should be call to DeliverEvent */
+	xE.u.u.type = ColormapNotify;
+	xE.u.colormap.window = pwin->drawable.id;
+	xE.u.colormap.colormap = *pmid;
+	xE.u.colormap.new = FALSE;
+	xE.u.colormap.state = ColormapUninstalled;
+	DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);
+    }
+
+    return (WT_WALKCHILDREN);
+}
+
+/* Tell window that pmid got installed */
+int
+TellGainedMap (WindowPtr pwin, pointer value)
+{
+    Colormap 	*pmid = (Colormap *)value;
+    xEvent 	xE;
+
+#ifdef PANORAMIX
+    if(!noPanoramiXExtension && pwin->drawable.pScreen->myNum)
+	return WT_STOPWALKING;
+#endif
+    if (wColormap (pwin) == *pmid)
+    {
+	/* This should be call to DeliverEvent */
+	xE.u.u.type = ColormapNotify;
+	xE.u.colormap.window = pwin->drawable.id;
+	xE.u.colormap.colormap = *pmid;
+	xE.u.colormap.new = FALSE;
+	xE.u.colormap.state = ColormapInstalled;
+	DeliverEvents(pwin, &xE, 1, (WindowPtr)NULL);
+    }
+
+    return (WT_WALKCHILDREN);
+}
+
+  
+int
+CopyColormapAndFree (Colormap mid, ColormapPtr pSrc, int client)
+{
+    ColormapPtr	pmap = (ColormapPtr) NULL;
+    int		result, alloc, size;
+    Colormap	midSrc;
+    ScreenPtr	pScreen;
+    VisualPtr	pVisual;
+
+    pScreen = pSrc->pScreen;
+    pVisual = pSrc->pVisual;
+    midSrc = pSrc->mid;
+    alloc = ((pSrc->flags & AllAllocated) && CLIENT_ID(midSrc) == client) ?
+            AllocAll : AllocNone;
+    size = pVisual->ColormapEntries;
+
+    /* If the create returns non-0, it failed */
+    result = CreateColormap (mid, pScreen, pVisual, &pmap, alloc, client);
+    if(result != Success)
+        return(result);
+    if(alloc == AllocAll)
+    {
+	memmove((char *)pmap->red, (char *)pSrc->red, size * sizeof(Entry));
+	if((pmap->class | DynamicClass) == DirectColor)
+	{
+	    memmove((char *)pmap->green, (char *)pSrc->green, size * sizeof(Entry));
+	    memmove((char *)pmap->blue, (char *)pSrc->blue, size * sizeof(Entry));
+	}
+	pSrc->flags &= ~AllAllocated;
+	FreePixels(pSrc, client);
+	UpdateColors(pmap);
+	return(Success);
+    }
+
+    CopyFree(REDMAP, client, pSrc, pmap);
+    if ((pmap->class | DynamicClass) == DirectColor)
+    {
+	CopyFree(GREENMAP, client, pSrc, pmap);
+	CopyFree(BLUEMAP, client, pSrc, pmap);
+    }
+    if (pmap->class & DynamicClass)
+	UpdateColors(pmap);
+    /* XXX should worry about removing any RT_CMAPENTRY resource */
+    return(Success);
+}
+
+/* Helper routine for freeing large numbers of cells from a map */
+static void
+CopyFree (int channel, int client, ColormapPtr pmapSrc, ColormapPtr pmapDst)
+{
+    int		z, npix;
+    EntryPtr	pentSrcFirst, pentDstFirst;
+    EntryPtr	pentSrc, pentDst;
+    Pixel	*ppix;
+    int		nalloc;
+
+    switch(channel)
+    {
+      default:	/* so compiler can see that everything gets initialized */
+      case REDMAP:
+	ppix = (pmapSrc->clientPixelsRed)[client];
+	npix = (pmapSrc->numPixelsRed)[client];
+	pentSrcFirst = pmapSrc->red;
+	pentDstFirst = pmapDst->red;
+	break;
+      case GREENMAP:
+	ppix = (pmapSrc->clientPixelsGreen)[client];
+	npix = (pmapSrc->numPixelsGreen)[client];
+	pentSrcFirst = pmapSrc->green;
+	pentDstFirst = pmapDst->green;
+	break;
+      case BLUEMAP:
+	ppix = (pmapSrc->clientPixelsBlue)[client];
+	npix = (pmapSrc->numPixelsBlue)[client];
+	pentSrcFirst = pmapSrc->blue;
+	pentDstFirst = pmapDst->blue;
+	break;
+    }
+    nalloc = 0;
+    if (pmapSrc->class & DynamicClass)
+    {
+	for(z = npix; --z >= 0; ppix++)
+	{
+	    /* Copy entries */
+	    pentSrc = pentSrcFirst + *ppix;
+	    pentDst = pentDstFirst + *ppix;
+	    if (pentDst->refcnt > 0)
+	    {
+		pentDst->refcnt++;
+	    }
+	    else
+	    {
+		*pentDst = *pentSrc;
+		nalloc++;
+		if (pentSrc->refcnt > 0)
+		    pentDst->refcnt = 1;
+		else
+		    pentSrc->fShared = FALSE;
+	    }
+	    FreeCell(pmapSrc, *ppix, channel);
+	}
+    }
+
+    /* Note that FreeCell has already fixed pmapSrc->free{Color} */
+    switch(channel)
+    {
+      case REDMAP:
+        pmapDst->freeRed -= nalloc;
+        (pmapDst->clientPixelsRed)[client] =
+	    (pmapSrc->clientPixelsRed)[client];
+        (pmapSrc->clientPixelsRed)[client] = (Pixel *) NULL;
+        (pmapDst->numPixelsRed)[client] = (pmapSrc->numPixelsRed)[client];
+        (pmapSrc->numPixelsRed)[client] = 0;
+	break;
+      case GREENMAP:
+        pmapDst->freeGreen -= nalloc;
+        (pmapDst->clientPixelsGreen)[client] =
+	    (pmapSrc->clientPixelsGreen)[client];
+        (pmapSrc->clientPixelsGreen)[client] = (Pixel *) NULL;
+        (pmapDst->numPixelsGreen)[client] = (pmapSrc->numPixelsGreen)[client];
+        (pmapSrc->numPixelsGreen)[client] = 0;
+	break;
+      case BLUEMAP:
+        pmapDst->freeBlue -= nalloc;
+        pmapDst->clientPixelsBlue[client] = pmapSrc->clientPixelsBlue[client];
+        pmapSrc->clientPixelsBlue[client] = (Pixel *) NULL;
+        pmapDst->numPixelsBlue[client] = pmapSrc->numPixelsBlue[client];
+        pmapSrc->numPixelsBlue[client] = 0;
+	break;
+    }
+}
+
+/* Free the ith entry in a color map.  Must handle freeing of
+ * colors allocated through AllocColorPlanes */
+static void
+FreeCell (ColormapPtr pmap, Pixel i, int channel)
+{
+    EntryPtr pent;
+    int	*pCount;
+
+
+    switch (channel)
+    {
+      default:	/* so compiler can see that everything gets initialized */
+      case PSEUDOMAP:
+      case REDMAP:
+          pent = (EntryPtr) &pmap->red[i];
+	  pCount = &pmap->freeRed;
+	  break;
+      case GREENMAP:
+          pent = (EntryPtr) &pmap->green[i];
+	  pCount = &pmap->freeGreen;
+	  break;
+      case BLUEMAP:
+          pent = (EntryPtr) &pmap->blue[i];
+	  pCount = &pmap->freeBlue;
+	  break;
+    }
+    /* If it's not privately allocated and it's not time to free it, just
+     * decrement the count */
+    if (pent->refcnt > 1)
+	pent->refcnt--;
+    else
+    {
+        /* If the color type is shared, find the sharedcolor. If decremented
+         * refcnt is 0, free the shared cell. */
+        if (pent->fShared)
+	{
+	    if(--pent->co.shco.red->refcnt == 0)
+		free(pent->co.shco.red);
+	    if(--pent->co.shco.green->refcnt == 0)
+		free(pent->co.shco.green);
+	    if(--pent->co.shco.blue->refcnt == 0)
+		free(pent->co.shco.blue);
+	    pent->fShared = FALSE;
+	}
+	pent->refcnt = 0;
+	*pCount += 1;
+    }
+}
+
+static void
+UpdateColors (ColormapPtr pmap)
+{
+    xColorItem		*defs;
+    xColorItem *pdef;
+    EntryPtr 	pent;
+    VisualPtr	pVisual;
+    int			i, n, size;
+
+    pVisual = pmap->pVisual;
+    size = pVisual->ColormapEntries;
+    defs = malloc(size * sizeof(xColorItem));
+    if (!defs)
+	return;
+    n = 0;
+    pdef = defs;
+    if (pmap->class == DirectColor)
+    {
+        for (i = 0; i < size; i++)
+	{
+	    if (!pmap->red[i].refcnt &&
+		!pmap->green[i].refcnt &&
+		!pmap->blue[i].refcnt)
+		continue;
+	    pdef->pixel = ((Pixel)i << pVisual->offsetRed) |
+			  ((Pixel)i << pVisual->offsetGreen) |
+			  ((Pixel)i << pVisual->offsetBlue);
+	    pdef->red = pmap->red[i].co.local.red;
+	    pdef->green = pmap->green[i].co.local.green;
+	    pdef->blue = pmap->blue[i].co.local.blue;
+	    pdef->flags = DoRed|DoGreen|DoBlue;
+	    pdef++;
+	    n++;
+	}
+    }
+    else
+    {
+        for (i = 0, pent = pmap->red; i < size; i++, pent++)
+	{
+	    if (!pent->refcnt)
+		continue;
+	    pdef->pixel = i;
+	    if(pent->fShared)
+	    {
+		pdef->red = pent->co.shco.red->color;
+		pdef->green = pent->co.shco.green->color;
+		pdef->blue = pent->co.shco.blue->color;
+	    }
+	    else
+	    {
+		pdef->red = pent->co.local.red;
+		pdef->green = pent->co.local.green;
+		pdef->blue = pent->co.local.blue;
+	    }
+	    pdef->flags = DoRed|DoGreen|DoBlue;
+	    pdef++;
+	    n++;
+	}
+    }
+    if (n)
+	(*pmap->pScreen->StoreColors)(pmap, n, defs);
+    free(defs);
+}
+
+/* Get a read-only color from a ColorMap (probably slow for large maps)
+ * Returns by changing the value in pred, pgreen, pblue and pPix
+ */
+int
+AllocColor (ColormapPtr pmap, 
+            unsigned short *pred, unsigned short *pgreen, unsigned short *pblue, 
+            Pixel *pPix, int client)
+{
+    Pixel	pixR, pixG, pixB;
+    int		entries;
+    xrgb	rgb;
+    int		class;
+    VisualPtr	pVisual;
+    int		npix;
+    Pixel	*ppix;
+
+    pVisual = pmap->pVisual;
+    (*pmap->pScreen->ResolveColor) (pred, pgreen, pblue, pVisual);
+    rgb.red = *pred;
+    rgb.green = *pgreen;
+    rgb.blue = *pblue;
+    class = pmap->class;
+    entries = pVisual->ColormapEntries;
+
+    /* If the colormap is being created, then we want to be able to change
+     * the colormap, even if it's a static type. Otherwise, we'd never be
+     * able to initialize static colormaps
+     */
+    if(pmap->flags & BeingCreated)
+	class |= DynamicClass;
+
+    /* If this is one of the static storage classes, and we're not initializing
+     * it, the best we can do is to find the closest color entry to the
+     * requested one and return that.
+     */
+    switch (class) {
+    case StaticColor:
+    case StaticGray:
+	/* Look up all three components in the same pmap */
+	*pPix = pixR = FindBestPixel(pmap->red, entries, &rgb, PSEUDOMAP);
+	*pred = pmap->red[pixR].co.local.red;
+	*pgreen = pmap->red[pixR].co.local.green;
+	*pblue = pmap->red[pixR].co.local.blue;
+	npix = pmap->numPixelsRed[client];
+	ppix = (Pixel *) realloc(pmap->clientPixelsRed[client],
+				  (npix + 1) * sizeof(Pixel));
+	if (!ppix)
+	    return (BadAlloc);
+	ppix[npix] = pixR;
+	pmap->clientPixelsRed[client] = ppix;
+	pmap->numPixelsRed[client]++;
+	break;
+
+    case TrueColor:
+	/* Look up each component in its own map, then OR them together */
+	pixR = FindBestPixel(pmap->red, NUMRED(pVisual), &rgb, REDMAP);
+	pixG = FindBestPixel(pmap->green, NUMGREEN(pVisual), &rgb, GREENMAP);
+	pixB = FindBestPixel(pmap->blue, NUMBLUE(pVisual), &rgb, BLUEMAP);
+	*pPix = (pixR << pVisual->offsetRed) |
+		(pixG << pVisual->offsetGreen) |
+		(pixB << pVisual->offsetBlue) |
+		ALPHAMASK(pVisual);
+	
+	*pred = pmap->red[pixR].co.local.red;
+	*pgreen = pmap->green[pixG].co.local.green;
+	*pblue = pmap->blue[pixB].co.local.blue;
+	npix = pmap->numPixelsRed[client];
+	ppix = (Pixel *) realloc(pmap->clientPixelsRed[client],
+				  (npix + 1) * sizeof(Pixel));
+	if (!ppix)
+	    return (BadAlloc);
+	ppix[npix] = pixR;
+	pmap->clientPixelsRed[client] = ppix;
+	npix = pmap->numPixelsGreen[client];
+	ppix = (Pixel *) realloc(pmap->clientPixelsGreen[client],
+				  (npix + 1) * sizeof(Pixel));
+	if (!ppix)
+	    return (BadAlloc);
+	ppix[npix] = pixG;
+	pmap->clientPixelsGreen[client] = ppix;
+	npix = pmap->numPixelsBlue[client];
+	ppix = (Pixel *) realloc(pmap->clientPixelsBlue[client],
+				  (npix + 1) * sizeof(Pixel));
+	if (!ppix)
+	    return (BadAlloc);
+	ppix[npix] = pixB;
+	pmap->clientPixelsBlue[client] = ppix;
+	pmap->numPixelsRed[client]++;
+	pmap->numPixelsGreen[client]++;
+	pmap->numPixelsBlue[client]++;
+	break;
+
+    case GrayScale:
+    case PseudoColor:
+	if (pmap->mid != pmap->pScreen->defColormap &&
+	    pmap->pVisual->vid == pmap->pScreen->rootVisual)
+	{
+	    ColormapPtr prootmap;
+	    dixLookupResourceByType((pointer *)&prootmap, pmap->pScreen->defColormap,
+				    RT_COLORMAP, clients[client], DixReadAccess);
+
+	    if (pmap->class == prootmap->class)
+		FindColorInRootCmap (prootmap, prootmap->red, entries, &rgb, 
+			pPix, PSEUDOMAP, AllComp);
+	}
+	if (FindColor(pmap, pmap->red, entries, &rgb, pPix, PSEUDOMAP,
+		      client, AllComp) != Success)
+	    return (BadAlloc);
+        break;
+
+    case DirectColor:
+	if (pmap->mid != pmap->pScreen->defColormap &&
+	    pmap->pVisual->vid == pmap->pScreen->rootVisual)
+	{
+	    ColormapPtr prootmap;
+	    dixLookupResourceByType((pointer *)&prootmap, pmap->pScreen->defColormap,
+				    RT_COLORMAP, clients[client], DixReadAccess);
+
+	    if (pmap->class == prootmap->class)
+	    {
+		pixR = (*pPix & pVisual->redMask) >> pVisual->offsetRed; 
+		FindColorInRootCmap (prootmap, prootmap->red, entries, &rgb, 
+			&pixR, REDMAP, RedComp);
+		pixG = (*pPix & pVisual->greenMask) >> pVisual->offsetGreen; 
+		FindColorInRootCmap (prootmap, prootmap->green, entries, &rgb, 
+			&pixG, GREENMAP, GreenComp);
+		pixB = (*pPix & pVisual->blueMask) >> pVisual->offsetBlue; 
+		FindColorInRootCmap (prootmap, prootmap->blue, entries, &rgb, 
+			&pixB, BLUEMAP, BlueComp);
+		*pPix = pixR | pixG | pixB;
+	    }
+	}
+
+	pixR = (*pPix & pVisual->redMask) >> pVisual->offsetRed; 
+	if (FindColor(pmap, pmap->red, NUMRED(pVisual), &rgb, &pixR, REDMAP,
+		      client, RedComp) != Success)
+	    return (BadAlloc);
+	pixG = (*pPix & pVisual->greenMask) >> pVisual->offsetGreen; 
+	if (FindColor(pmap, pmap->green, NUMGREEN(pVisual), &rgb, &pixG,
+		      GREENMAP, client, GreenComp) != Success)
+	{
+	    (void)FreeCo(pmap, client, REDMAP, 1, &pixR, (Pixel)0);
+	    return (BadAlloc);
+	}
+	pixB = (*pPix & pVisual->blueMask) >> pVisual->offsetBlue; 
+	if (FindColor(pmap, pmap->blue, NUMBLUE(pVisual), &rgb, &pixB, BLUEMAP,
+		      client, BlueComp) != Success)
+	{
+	    (void)FreeCo(pmap, client, GREENMAP, 1, &pixG, (Pixel)0);
+	    (void)FreeCo(pmap, client, REDMAP, 1, &pixR, (Pixel)0);
+	    return (BadAlloc);
+	}
+	*pPix = pixR | pixG | pixB | ALPHAMASK(pVisual);
+
+	break;
+    }
+
+    /* if this is the client's first pixel in this colormap, tell the
+     * resource manager that the client has pixels in this colormap which
+     * should be freed when the client dies */
+    if ((pmap->numPixelsRed[client] == 1) &&
+	(CLIENT_ID(pmap->mid) != client) &&
+	!(pmap->flags & BeingCreated))
+    {
+	colorResource	*pcr;
+
+	pcr = malloc(sizeof(colorResource));
+	if (!pcr)
+	{
+	    (void)FreeColors(pmap, client, 1, pPix, (Pixel)0);
+	    return (BadAlloc);
+	}
+	pcr->mid = pmap->mid;
+	pcr->client = client;
+	if (!AddResource(FakeClientID(client), RT_CMAPENTRY, (pointer)pcr))
+	    return (BadAlloc);
+    }
+    return (Success);
+}
+
+/*
+ * FakeAllocColor -- fake an AllocColor request by
+ * returning a free pixel if availible, otherwise returning
+ * the closest matching pixel.  This is used by the mi
+ * software sprite code to recolor cursors.  A nice side-effect
+ * is that this routine will never return failure.
+ */
+
+void
+FakeAllocColor (ColormapPtr pmap, xColorItem *item)
+{
+    Pixel pixR, pixG, pixB;
+    Pixel temp;
+    int	entries;
+    xrgb rgb;
+    int	class;
+    VisualPtr pVisual;
+
+    pVisual = pmap->pVisual;
+    rgb.red = item->red;
+    rgb.green = item->green;
+    rgb.blue = item->blue;
+    (*pmap->pScreen->ResolveColor) (&rgb.red, &rgb.green, &rgb.blue, pVisual);
+    class = pmap->class;
+    entries = pVisual->ColormapEntries;
+
+    switch (class) {
+    case GrayScale:
+    case PseudoColor:
+	temp = 0;
+	item->pixel = 0;
+	if (FindColor(pmap, pmap->red, entries, &rgb, &temp, PSEUDOMAP,
+		      -1, AllComp) == Success) {
+	    item->pixel = temp;
+	    break;
+	}
+	/* fall through ... */
+    case StaticColor:
+    case StaticGray:
+	item->pixel = FindBestPixel(pmap->red, entries, &rgb, PSEUDOMAP);
+	break;
+
+    case DirectColor:
+	/* Look up each component in its own map, then OR them together */
+	pixR = (item->pixel & pVisual->redMask) >> pVisual->offsetRed; 
+	pixG = (item->pixel & pVisual->greenMask) >> pVisual->offsetGreen; 
+	pixB = (item->pixel & pVisual->blueMask) >> pVisual->offsetBlue; 
+	if (FindColor(pmap, pmap->red, NUMRED(pVisual), &rgb, &pixR, REDMAP,
+		      -1, RedComp) != Success)
+	    pixR = FindBestPixel(pmap->red, NUMRED(pVisual), &rgb, REDMAP)
+			<< pVisual->offsetRed;
+	if (FindColor(pmap, pmap->green, NUMGREEN(pVisual), &rgb, &pixG,
+		      GREENMAP, -1, GreenComp) != Success)
+	    pixG = FindBestPixel(pmap->green, NUMGREEN(pVisual), &rgb,
+				 GREENMAP) << pVisual->offsetGreen;
+	if (FindColor(pmap, pmap->blue, NUMBLUE(pVisual), &rgb, &pixB, BLUEMAP,
+		      -1, BlueComp) != Success)
+	    pixB = FindBestPixel(pmap->blue, NUMBLUE(pVisual), &rgb, BLUEMAP)
+			<< pVisual->offsetBlue;
+	item->pixel = pixR | pixG | pixB;
+	break;
+
+    case TrueColor:
+	/* Look up each component in its own map, then OR them together */
+	pixR = FindBestPixel(pmap->red, NUMRED(pVisual), &rgb, REDMAP);
+	pixG = FindBestPixel(pmap->green, NUMGREEN(pVisual), &rgb, GREENMAP);
+	pixB = FindBestPixel(pmap->blue, NUMBLUE(pVisual), &rgb, BLUEMAP);
+	item->pixel = (pixR << pVisual->offsetRed) |
+		      (pixG << pVisual->offsetGreen) |
+		      (pixB << pVisual->offsetBlue);
+	break;
+    }
+}
+
+/* free a pixel value obtained from FakeAllocColor */
+void
+FakeFreeColor(ColormapPtr pmap, Pixel pixel)
+{
+    VisualPtr pVisual;
+    Pixel pixR, pixG, pixB;
+
+    switch (pmap->class) {
+    case GrayScale:
+    case PseudoColor:
+	if (pmap->red[pixel].refcnt == AllocTemporary)
+	    pmap->red[pixel].refcnt = 0;
+	break;
+    case DirectColor:
+	pVisual = pmap->pVisual;
+	pixR = (pixel & pVisual->redMask) >> pVisual->offsetRed; 
+	pixG = (pixel & pVisual->greenMask) >> pVisual->offsetGreen; 
+	pixB = (pixel & pVisual->blueMask) >> pVisual->offsetBlue; 
+	if (pmap->red[pixR].refcnt == AllocTemporary)
+	    pmap->red[pixR].refcnt = 0;
+	if (pmap->green[pixG].refcnt == AllocTemporary)
+	    pmap->green[pixG].refcnt = 0;
+	if (pmap->blue[pixB].refcnt == AllocTemporary)
+	    pmap->blue[pixB].refcnt = 0;
+	break;
+    }
+}
+
+typedef unsigned short	BigNumUpper;
+typedef unsigned long	BigNumLower;
+
+#define BIGNUMLOWERBITS	24
+#define BIGNUMUPPERBITS	16
+#define BIGNUMLOWER (1 << BIGNUMLOWERBITS)
+#define BIGNUMUPPER (1 << BIGNUMUPPERBITS)
+#define UPPERPART(i)	((i) >> BIGNUMLOWERBITS)
+#define LOWERPART(i)	((i) & (BIGNUMLOWER - 1))
+
+typedef struct _bignum {
+    BigNumUpper	upper;
+    BigNumLower	lower;
+} BigNumRec, *BigNumPtr;
+
+#define BigNumGreater(x,y) (((x)->upper > (y)->upper) ||\
+			    ((x)->upper == (y)->upper && (x)->lower > (y)->lower))
+
+#define UnsignedToBigNum(u,r)	(((r)->upper = UPPERPART(u)), \
+				 ((r)->lower = LOWERPART(u)))
+
+#define MaxBigNum(r)		(((r)->upper = BIGNUMUPPER-1), \
+				 ((r)->lower = BIGNUMLOWER-1))
+
+static void
+BigNumAdd (BigNumPtr x, BigNumPtr y, BigNumPtr r)
+{
+    BigNumLower	lower, carry = 0;
+
+    lower = x->lower + y->lower;
+    if (lower >= BIGNUMLOWER) {
+	lower -= BIGNUMLOWER;
+	carry = 1;
+    }
+    r->lower = lower;
+    r->upper = x->upper + y->upper + carry;
+}
+
+static Pixel
+FindBestPixel(EntryPtr pentFirst, int size, xrgb *prgb, int channel)
+{
+    EntryPtr	pent;
+    Pixel	pixel, final;
+    long	dr, dg, db;
+    unsigned long   sq;
+    BigNumRec	minval, sum, temp;
+
+    final = 0;
+    MaxBigNum(&minval);
+    /* look for the minimal difference */
+    for (pent = pentFirst, pixel = 0; pixel < size; pent++, pixel++)
+    {
+	dr = dg = db = 0;
+	switch(channel)
+	{
+	  case PSEUDOMAP:
+	      dg = (long) pent->co.local.green - prgb->green;
+	      db = (long) pent->co.local.blue - prgb->blue;
+	  case REDMAP:
+	      dr = (long) pent->co.local.red - prgb->red;
+	      break;
+	  case GREENMAP:
+	      dg = (long) pent->co.local.green - prgb->green;
+	      break;
+	  case BLUEMAP:
+	      db = (long) pent->co.local.blue - prgb->blue;
+	      break;
+	}
+	sq = dr * dr;
+	UnsignedToBigNum (sq, &sum);
+	sq = dg * dg;
+	UnsignedToBigNum (sq, &temp);
+	BigNumAdd (&sum, &temp, &sum);
+	sq = db * db;
+	UnsignedToBigNum (sq, &temp);
+	BigNumAdd (&sum, &temp, &sum);
+	if (BigNumGreater (&minval, &sum))
+	{
+	    final = pixel;
+	    minval = sum;
+	}
+    }
+    return(final);
+}
+
+static void
+FindColorInRootCmap (ColormapPtr pmap, EntryPtr pentFirst, int size, 
+                     xrgb *prgb, Pixel *pPixel, int channel, 
+                     ColorCompareProcPtr comp)
+{
+    EntryPtr    pent;
+    Pixel	pixel;
+    int         count;
+
+    if ((pixel = *pPixel) >= size)
+	pixel = 0;
+    for (pent = pentFirst + pixel, count = size; --count >= 0; pent++, pixel++)
+    {
+	if (pent->refcnt > 0 && (*comp) (pent, prgb))
+	{
+	    switch (channel)
+	    {
+	    case REDMAP:
+		pixel <<= pmap->pVisual->offsetRed;
+		break;
+	    case GREENMAP:
+		pixel <<= pmap->pVisual->offsetGreen;
+		break;
+	    case BLUEMAP:
+		pixel <<= pmap->pVisual->offsetBlue;
+		break;
+	    default: /* PSEUDOMAP */
+		break;
+	    }
+	    *pPixel = pixel;
+	}
+    }
+}
+
+/* Tries to find a color in pmap that exactly matches the one requested in prgb
+ * if it can't it allocates one.
+ * Starts looking at pentFirst + *pPixel, so if you want a specific pixel,
+ * load *pPixel with that value, otherwise set it to 0
+ */
+int
+FindColor (ColormapPtr pmap, EntryPtr pentFirst, int size, xrgb *prgb, 
+           Pixel *pPixel, int channel, int client, 
+           ColorCompareProcPtr comp)
+{
+    EntryPtr	pent;
+    Bool	foundFree;
+    Pixel	pixel, Free = 0;
+    int		npix, count, *nump = NULL;
+    Pixel	**pixp = NULL, *ppix;
+    xColorItem	def;
+
+    foundFree = FALSE;
+
+    if((pixel = *pPixel) >= size)
+	pixel = 0;
+    /* see if there is a match, and also look for a free entry */
+    for (pent = pentFirst + pixel, count = size; --count >= 0; )
+    {
+        if (pent->refcnt > 0)
+	{
+    	    if ((*comp) (pent, prgb))
+	    {
+		if (client >= 0)
+		    pent->refcnt++;
+		*pPixel = pixel;
+		switch(channel)
+		{
+		  case REDMAP:
+		    *pPixel <<= pmap->pVisual->offsetRed;
+		  case PSEUDOMAP:
+		    break;
+		  case GREENMAP:
+		    *pPixel <<= pmap->pVisual->offsetGreen;
+		    break;
+		  case BLUEMAP:
+		    *pPixel <<= pmap->pVisual->offsetBlue;
+		    break;
+		}
+		goto gotit;
+    	    }
+        }
+	else if (!foundFree && pent->refcnt == 0)
+	{
+	    Free = pixel;
+	    foundFree = TRUE;
+	    /* If we're initializing the colormap, then we are looking for
+	     * the first free cell we can find, not to minimize the number
+	     * of entries we use.  So don't look any further. */
+	    if(pmap->flags & BeingCreated)
+		break;
+	}
+	pixel++;
+	if(pixel >= size)
+	{
+	    pent = pentFirst;
+	    pixel = 0;
+	}
+	else
+	    pent++;
+    }
+
+    /* If we got here, we didn't find a match.  If we also didn't find
+     * a free entry, we're out of luck.  Otherwise, we'll usurp a free
+     * entry and fill it in */
+    if (!foundFree)
+	return (BadAlloc);
+    pent = pentFirst + Free;
+    pent->fShared = FALSE;
+    pent->refcnt = (client >= 0) ? 1 : AllocTemporary;
+
+    switch (channel)
+    {
+      case PSEUDOMAP:
+        pent->co.local.red = prgb->red;
+        pent->co.local.green = prgb->green;
+        pent->co.local.blue = prgb->blue;
+        def.red = prgb->red;
+	def.green = prgb->green;
+	def.blue = prgb->blue;
+	def.flags = (DoRed|DoGreen|DoBlue);
+	if (client >= 0)
+	    pmap->freeRed--;
+	def.pixel = Free;
+	break;
+
+      case REDMAP:
+        pent->co.local.red = prgb->red;
+        def.red = prgb->red;
+	def.green = pmap->green[0].co.local.green;
+	def.blue = pmap->blue[0].co.local.blue;
+	def.flags = DoRed;
+	if (client >= 0)
+	    pmap->freeRed--;
+	def.pixel = Free << pmap->pVisual->offsetRed;
+	break;
+
+      case GREENMAP:
+	pent->co.local.green = prgb->green;
+	def.red = pmap->red[0].co.local.red;
+        def.green = prgb->green;
+	def.blue = pmap->blue[0].co.local.blue;
+	def.flags = DoGreen;
+	if (client >= 0)
+	    pmap->freeGreen--;
+	def.pixel = Free << pmap->pVisual->offsetGreen;
+	break;
+
+      case BLUEMAP:
+	pent->co.local.blue = prgb->blue;
+	def.red = pmap->red[0].co.local.red;
+	def.green = pmap->green[0].co.local.green;
+	def.blue = prgb->blue;
+	def.flags = DoBlue;
+	if (client >= 0)
+	    pmap->freeBlue--;
+	def.pixel = Free << pmap->pVisual->offsetBlue;
+	break;
+    }
+    (*pmap->pScreen->StoreColors) (pmap, 1, &def);
+    pixel = Free;	
+    *pPixel = def.pixel;
+
+gotit:
+    if (pmap->flags & BeingCreated || client == -1)
+	return(Success);
+    /* Now remember the pixel, for freeing later */
+    switch (channel)
+    {
+      case PSEUDOMAP:
+      case REDMAP:
+	nump = pmap->numPixelsRed;
+	pixp = pmap->clientPixelsRed;
+	break;
+
+      case GREENMAP:
+	nump = pmap->numPixelsGreen;
+	pixp = pmap->clientPixelsGreen;
+	break;
+
+      case BLUEMAP:
+	nump = pmap->numPixelsBlue;
+	pixp = pmap->clientPixelsBlue;
+	break;
+    }
+    npix = nump[client];
+    ppix = (Pixel *) realloc(pixp[client], (npix + 1) * sizeof(Pixel));
+    if (!ppix)
+    {
+	pent->refcnt--;
+	if (!pent->fShared)
+	    switch (channel)
+	    {
+	      case PSEUDOMAP:
+	      case REDMAP:
+		pmap->freeRed++;
+		break;
+	      case GREENMAP:
+		pmap->freeGreen++;
+		break;
+	      case BLUEMAP:
+		pmap->freeBlue++;
+		break;
+	    }
+	return(BadAlloc);
+    }
+    ppix[npix] = pixel;
+    pixp[client] = ppix;
+    nump[client]++;
+
+    return(Success);
+}
+
+/* Comparison functions -- passed to FindColor to determine if an
+ * entry is already the color we're looking for or not */
+static int
+AllComp (EntryPtr pent, xrgb *prgb)
+{
+    if((pent->co.local.red == prgb->red) &&
+       (pent->co.local.green == prgb->green) &&
+       (pent->co.local.blue == prgb->blue) )
+       return (1);
+    return (0);
+}
+
+static int
+RedComp (EntryPtr pent, xrgb *prgb)
+{
+    if (pent->co.local.red == prgb->red) 
+	return (1);
+    return (0);
+}
+
+static int
+GreenComp (EntryPtr pent, xrgb *prgb)
+{
+    if (pent->co.local.green == prgb->green) 
+	return (1);
+    return (0);
+}
+
+static int
+BlueComp (EntryPtr pent, xrgb *prgb)
+{
+    if (pent->co.local.blue == prgb->blue) 
+	return (1);
+    return (0);
+}
+
+
+/* Read the color value of a cell */
+
+int
+QueryColors (ColormapPtr pmap, int count, Pixel *ppixIn, xrgb *prgbList, ClientPtr client)
+{
+    Pixel	*ppix, pixel;
+    xrgb	*prgb;
+    VisualPtr	pVisual;
+    EntryPtr	pent;
+    Pixel	i;
+    int		errVal = Success;
+
+    pVisual = pmap->pVisual;
+    if ((pmap->class | DynamicClass) == DirectColor)
+    {
+	int numred, numgreen, numblue;
+	Pixel rgbbad;
+
+	numred = NUMRED(pVisual);
+	numgreen = NUMGREEN(pVisual);
+	numblue = NUMBLUE(pVisual);
+	rgbbad = ~RGBMASK(pVisual);
+	for( ppix = ppixIn, prgb = prgbList; --count >= 0; ppix++, prgb++)
+	{
+	    pixel = *ppix;
+	    if (pixel & rgbbad) {
+		client->errorValue = pixel;
+		errVal =  BadValue;
+		continue;
+	    }
+	    i  = (pixel & pVisual->redMask) >> pVisual->offsetRed;
+	    if (i >= numred)
+	    {
+		client->errorValue = pixel;
+		errVal =  BadValue;
+		continue;
+	    }
+	    prgb->red = pmap->red[i].co.local.red;
+	    i  = (pixel & pVisual->greenMask) >> pVisual->offsetGreen;
+	    if (i >= numgreen)
+	    {
+		client->errorValue = pixel;
+		errVal =  BadValue;
+		continue;
+	    }
+	    prgb->green = pmap->green[i].co.local.green;
+	    i  = (pixel & pVisual->blueMask) >> pVisual->offsetBlue;
+	    if (i >= numblue)
+	    {
+		client->errorValue = pixel;
+		errVal =  BadValue;
+		continue;
+	    }
+	    prgb->blue = pmap->blue[i].co.local.blue;
+	}
+    }
+    else
+    {
+	for( ppix = ppixIn, prgb = prgbList; --count >= 0; ppix++, prgb++)
+	{
+	    pixel = *ppix;
+	    if (pixel >= pVisual->ColormapEntries)
+	    {
+		client->errorValue = pixel;
+		errVal = BadValue;
+	    }
+	    else
+	    {
+		pent = (EntryPtr)&pmap->red[pixel];
+		if (pent->fShared)
+		{
+		    prgb->red = pent->co.shco.red->color;
+		    prgb->green = pent->co.shco.green->color;
+		    prgb->blue = pent->co.shco.blue->color;
+		}
+		else
+		{
+		    prgb->red = pent->co.local.red;
+		    prgb->green = pent->co.local.green;
+		    prgb->blue = pent->co.local.blue;
+		}
+	    }
+	}
+    }
+    return (errVal);
+}
+
+static void
+FreePixels(ColormapPtr pmap, int client)
+{
+    Pixel *ppix, *ppixStart;
+    int n;
+    int	class;
+
+    class = pmap->class;
+    ppixStart = pmap->clientPixelsRed[client];
+    if (class & DynamicClass)
+    {
+	n = pmap->numPixelsRed[client];
+	for (ppix = ppixStart; --n >= 0; )
+	{
+	    FreeCell(pmap, *ppix, REDMAP);
+	    ppix++;
+	}
+    }
+
+    free(ppixStart);
+    pmap->clientPixelsRed[client] = (Pixel *) NULL;
+    pmap->numPixelsRed[client] = 0;
+    if ((class | DynamicClass) == DirectColor) 
+    {
+        ppixStart = pmap->clientPixelsGreen[client];
+	if (class & DynamicClass)
+	    for (ppix = ppixStart, n = pmap->numPixelsGreen[client]; --n >= 0;)
+		FreeCell(pmap, *ppix++, GREENMAP);
+	free(ppixStart);
+	pmap->clientPixelsGreen[client] = (Pixel *) NULL;
+	pmap->numPixelsGreen[client] = 0;
+
+        ppixStart = pmap->clientPixelsBlue[client];
+	if (class & DynamicClass)
+	    for (ppix = ppixStart, n = pmap->numPixelsBlue[client]; --n >= 0; )
+		FreeCell(pmap, *ppix++, BLUEMAP);
+	free(ppixStart);
+	pmap->clientPixelsBlue[client] = (Pixel *) NULL;
+	pmap->numPixelsBlue[client] = 0;
+    }
+}
+
+/** 
+ * Frees all of a client's colors and cells.
+ *
+ *  \param value  must conform to DeleteType
+ *  \unused fakeid
+ */
+int
+FreeClientPixels (pointer value, XID fakeid)
+{
+    pointer pmap;
+    colorResource *pcr = value;
+    int rc;
+
+    rc = dixLookupResourceByType(&pmap, pcr->mid, RT_COLORMAP, serverClient,
+				 DixRemoveAccess);
+    if (rc == Success)
+	FreePixels((ColormapPtr)pmap, pcr->client);
+    free(pcr);
+    return Success;
+}
+
+int
+AllocColorCells (int client, ColormapPtr pmap, int colors, int planes, 
+                 Bool contig, Pixel *ppix, Pixel *masks)
+{
+    Pixel	rmask, gmask, bmask, *ppixFirst, r, g, b;
+    int		n, class;
+    int		ok;
+    int		oldcount;
+    colorResource *pcr = (colorResource *)NULL;
+
+    class = pmap->class;
+    if (!(class & DynamicClass))
+	return (BadAlloc); /* Shouldn't try on this type */
+    oldcount = pmap->numPixelsRed[client];
+    if (pmap->class == DirectColor)
+	oldcount += pmap->numPixelsGreen[client] + pmap->numPixelsBlue[client];
+    if (!oldcount && (CLIENT_ID(pmap->mid) != client))
+    {
+	pcr = malloc(sizeof(colorResource));
+	if (!pcr)
+	    return (BadAlloc);
+    }
+
+    if (pmap->class == DirectColor)
+    {
+        ok = AllocDirect (client, pmap, colors, planes, planes, planes,
+			  contig, ppix, &rmask, &gmask, &bmask);
+	if(ok == Success)
+	{
+	    for (r = g = b = 1, n = planes; --n >= 0; r += r, g += g, b += b)
+	    {
+		while(!(rmask & r))
+		    r += r;
+		while(!(gmask & g))
+		    g += g;
+		while(!(bmask & b))
+		    b += b;
+		*masks++ = r | g | b;
+	    }
+	}
+    }
+    else
+    {
+        ok = AllocPseudo (client, pmap, colors, planes, contig, ppix, &rmask,
+			  &ppixFirst);
+	if(ok == Success)
+	{
+	    for (r = 1, n = planes; --n >= 0; r += r)
+	    {
+		while(!(rmask & r))
+		    r += r;
+		*masks++ = r;
+	    }
+	}
+    }
+
+    /* if this is the client's first pixels in this colormap, tell the
+     * resource manager that the client has pixels in this colormap which
+     * should be freed when the client dies */
+    if ((ok == Success) && pcr)
+    {
+	pcr->mid = pmap->mid;
+	pcr->client = client;
+	if (!AddResource(FakeClientID(client), RT_CMAPENTRY, (pointer)pcr))
+	    ok = BadAlloc;
+    } else if (pcr)
+	free(pcr);
+
+    return (ok);
+}
+
+
+int
+AllocColorPlanes (int client, ColormapPtr pmap, int colors, 
+                  int r, int g, int b, Bool contig, Pixel *pixels, 
+                  Pixel *prmask, Pixel *pgmask, Pixel *pbmask)
+{
+    int		ok;
+    Pixel	mask, *ppixFirst;
+    Pixel shift;
+    int i;
+    int		class;
+    int		oldcount;
+    colorResource *pcr = (colorResource *)NULL;
+
+    class = pmap->class;
+    if (!(class & DynamicClass))
+	return (BadAlloc); /* Shouldn't try on this type */
+    oldcount = pmap->numPixelsRed[client];
+    if (class == DirectColor)
+	oldcount += pmap->numPixelsGreen[client] + pmap->numPixelsBlue[client];
+    if (!oldcount && (CLIENT_ID(pmap->mid) != client))
+    {
+	pcr = malloc(sizeof(colorResource));
+	if (!pcr)
+	    return (BadAlloc);
+    }
+
+    if (class == DirectColor)
+    {
+        ok = AllocDirect (client, pmap, colors, r, g, b, contig, pixels,
+			  prmask, pgmask, pbmask);
+    }
+    else
+    {
+	/* Allocate the proper pixels */
+	/* XXX This is sort of bad, because of contig is set, we force all
+	 * r + g + b bits to be contiguous.  Should only force contiguity
+	 * per mask 
+	 */
+        ok = AllocPseudo (client, pmap, colors, r + g + b, contig, pixels,
+			  &mask, &ppixFirst);
+
+	if(ok == Success)
+	{
+	    /* now split that mask into three */
+	    *prmask = *pgmask = *pbmask = 0;
+	    shift = 1;
+	    for (i = r; --i >= 0; shift += shift)
+	    {
+		while (!(mask & shift))
+		    shift += shift;
+		*prmask |= shift;
+	    }
+	    for (i = g; --i >= 0; shift += shift)
+	    {
+		while (!(mask & shift))
+		    shift += shift;
+		*pgmask |= shift;
+	    }
+	    for (i = b; --i >= 0; shift += shift)
+	    {
+		while (!(mask & shift))
+		    shift += shift;
+		*pbmask |= shift;
+	    }
+
+	    /* set up the shared color cells */
+	    if (!AllocShared(pmap, pixels, colors, r, g, b,
+			     *prmask, *pgmask, *pbmask, ppixFirst))
+	    {
+		(void)FreeColors(pmap, client, colors, pixels, mask);
+		ok = BadAlloc;
+	    }
+	}
+    }
+
+    /* if this is the client's first pixels in this colormap, tell the
+     * resource manager that the client has pixels in this colormap which
+     * should be freed when the client dies */
+    if ((ok == Success) && pcr)
+    {
+	pcr->mid = pmap->mid;
+	pcr->client = client;
+	if (!AddResource(FakeClientID(client), RT_CMAPENTRY, (pointer)pcr))
+	    ok = BadAlloc;
+    } else if (pcr)
+	free(pcr);
+
+    return (ok);
+}
+
+static int
+AllocDirect (int client, ColormapPtr pmap, int c, int r, int g, int b, Bool contig, 
+             Pixel *pixels, Pixel *prmask, Pixel *pgmask, Pixel *pbmask)
+{
+    Pixel	*ppixRed, *ppixGreen, *ppixBlue;
+    Pixel	*ppix, *pDst, *p;
+    int		npix, npixR, npixG, npixB;
+    Bool	okR, okG, okB;
+    Pixel	*rpix = 0, *gpix = 0, *bpix = 0;
+
+    npixR = c << r;
+    npixG = c << g;
+    npixB = c << b;
+    if ((r >= 32) || (g >= 32) || (b >= 32) ||
+	(npixR > pmap->freeRed) || (npixR < c) ||
+	(npixG > pmap->freeGreen) || (npixG < c) ||
+	(npixB > pmap->freeBlue) || (npixB < c))
+	return BadAlloc;
+
+    /* start out with empty pixels */
+    for(p = pixels; p < pixels + c; p++)
+	*p = 0;
+
+    ppixRed = malloc(npixR * sizeof(Pixel));
+    ppixGreen = malloc(npixG * sizeof(Pixel));
+    ppixBlue = malloc(npixB * sizeof(Pixel));
+    if (!ppixRed || !ppixGreen || !ppixBlue)
+    {
+	if (ppixBlue) free(ppixBlue);
+	if (ppixGreen) free(ppixGreen);
+	if (ppixRed) free(ppixRed);
+	return(BadAlloc);
+    }
+
+    okR = AllocCP(pmap, pmap->red, c, r, contig, ppixRed, prmask);
+    okG = AllocCP(pmap, pmap->green, c, g, contig, ppixGreen, pgmask);
+    okB = AllocCP(pmap, pmap->blue, c, b, contig, ppixBlue, pbmask);
+
+    if (okR && okG && okB)
+    {
+	rpix = (Pixel *) realloc(pmap->clientPixelsRed[client],
+				  (pmap->numPixelsRed[client] + (c << r)) *
+				  sizeof(Pixel));
+	if (rpix)
+	    pmap->clientPixelsRed[client] = rpix;
+	gpix = (Pixel *) realloc(pmap->clientPixelsGreen[client],
+				  (pmap->numPixelsGreen[client] + (c << g)) *
+				  sizeof(Pixel));
+	if (gpix)
+	    pmap->clientPixelsGreen[client] = gpix;
+	bpix = (Pixel *) realloc(pmap->clientPixelsBlue[client],
+				  (pmap->numPixelsBlue[client] + (c << b)) *
+				  sizeof(Pixel));
+	if (bpix)
+	    pmap->clientPixelsBlue[client] = bpix;
+    }
+
+    if (!okR || !okG || !okB || !rpix || !gpix || !bpix)
+    {
+	if (okR)
+	    for(ppix = ppixRed, npix = npixR; --npix >= 0; ppix++)
+		pmap->red[*ppix].refcnt = 0;
+	if (okG)
+	    for(ppix = ppixGreen, npix = npixG; --npix >= 0; ppix++)
+		pmap->green[*ppix].refcnt = 0;
+	if (okB)
+	    for(ppix = ppixBlue, npix = npixB; --npix >= 0; ppix++)
+		pmap->blue[*ppix].refcnt = 0;
+	free(ppixBlue);
+	free(ppixGreen);
+	free(ppixRed);
+	return(BadAlloc);
+    }
+
+    *prmask <<= pmap->pVisual->offsetRed;
+    *pgmask <<= pmap->pVisual->offsetGreen;
+    *pbmask <<= pmap->pVisual->offsetBlue;
+
+    ppix = rpix + pmap->numPixelsRed[client];
+    for (pDst = pixels, p = ppixRed; p < ppixRed + npixR; p++)
+    {
+	*ppix++ = *p;
+	if(p < ppixRed + c)
+	    *pDst++ |= *p << pmap->pVisual->offsetRed;
+    }
+    pmap->numPixelsRed[client] += npixR;
+    pmap->freeRed -= npixR;
+
+    ppix = gpix + pmap->numPixelsGreen[client];
+    for (pDst = pixels, p = ppixGreen; p < ppixGreen + npixG; p++)
+    {
+	*ppix++ = *p;
+	if(p < ppixGreen + c)
+	    *pDst++ |= *p << pmap->pVisual->offsetGreen;
+    }
+    pmap->numPixelsGreen[client] += npixG;
+    pmap->freeGreen -= npixG;
+
+    ppix = bpix + pmap->numPixelsBlue[client];
+    for (pDst = pixels, p = ppixBlue; p < ppixBlue + npixB; p++)
+    {
+	*ppix++ = *p;
+	if(p < ppixBlue + c)
+	    *pDst++ |= *p << pmap->pVisual->offsetBlue;
+    }
+    pmap->numPixelsBlue[client] += npixB;
+    pmap->freeBlue -= npixB;
+
+
+    for (pDst = pixels; pDst < pixels + c; pDst++)
+	*pDst |= ALPHAMASK(pmap->pVisual);
+
+    free(ppixBlue);
+    free(ppixGreen);
+    free(ppixRed);
+
+    return (Success);
+}
+
+static int
+AllocPseudo (int client, ColormapPtr pmap, int c, int r, Bool contig, 
+             Pixel *pixels, Pixel *pmask, Pixel **pppixFirst)
+{
+    Pixel	*ppix, *p, *pDst, *ppixTemp;
+    int		npix;
+    Bool	ok;
+
+    npix = c << r;
+    if ((r >= 32) || (npix > pmap->freeRed) || (npix < c))
+	return(BadAlloc);
+    if(!(ppixTemp = malloc(npix * sizeof(Pixel))))
+	return(BadAlloc);
+    ok = AllocCP(pmap, pmap->red, c, r, contig, ppixTemp, pmask);
+
+    if (ok)
+    {
+
+	/* all the allocated pixels are added to the client pixel list,
+	 * but only the unique ones are returned to the client */
+	ppix = (Pixel *)realloc(pmap->clientPixelsRed[client],
+			 (pmap->numPixelsRed[client] + npix) * sizeof(Pixel));
+	if (!ppix)
+	{
+	    for (p = ppixTemp; p < ppixTemp + npix; p++)
+		pmap->red[*p].refcnt = 0;
+	    return (BadAlloc);
+	}
+	pmap->clientPixelsRed[client] = ppix;
+	ppix += pmap->numPixelsRed[client];
+	*pppixFirst = ppix;
+	pDst = pixels;
+	for (p = ppixTemp; p < ppixTemp + npix; p++)
+	{
+	    *ppix++ = *p;
+	    if(p < ppixTemp + c)
+	        *pDst++ = *p;
+	}
+	pmap->numPixelsRed[client] += npix;
+	pmap->freeRed -= npix;
+    }
+    free(ppixTemp);
+    return (ok ? Success : BadAlloc);
+}
+
+/* Allocates count << planes pixels from colormap pmap for client. If
+ * contig, then the plane mask is made of consecutive bits.  Returns
+ * all count << pixels in the array pixels. The first count of those
+ * pixels are the unique pixels.  *pMask has the mask to Or with the
+ * unique pixels to get the rest of them.
+ *
+ * Returns True iff all pixels could be allocated 
+ * All cells allocated will have refcnt set to AllocPrivate and shared to FALSE
+ * (see AllocShared for why we care)
+ */
+static Bool
+AllocCP (ColormapPtr pmap, EntryPtr pentFirst, int count, int planes, 
+         Bool contig, Pixel *pixels, Pixel *pMask)
+{
+    EntryPtr	ent;
+    Pixel	pixel, base, entries, maxp, save;
+    int		dplanes, found;
+    Pixel	*ppix;
+    Pixel	mask;
+    Pixel	finalmask;
+
+    dplanes = pmap->pVisual->nplanes;
+
+    /* Easy case.  Allocate pixels only */
+    if (planes == 0)
+    {
+        /* allocate writable entries */
+	ppix = pixels;
+        ent = pentFirst;
+        pixel = 0;
+        while (--count >= 0)
+	{
+            /* Just find count unallocated cells */
+    	    while (ent->refcnt)
+	    {
+    	        ent++;
+    	        pixel++;
+    	    }
+    	    ent->refcnt = AllocPrivate;
+    	    *ppix++ = pixel;
+	    ent->fShared = FALSE;
+        }
+        *pMask = 0;
+        return (TRUE);
+    }
+    else if (planes > dplanes)
+    {
+	return (FALSE);
+    }
+
+    /* General case count pixels * 2 ^ planes cells to be allocated */
+
+    /* make room for new pixels */
+    ent = pentFirst;
+
+    /* first try for contiguous planes, since it's fastest */
+    for (mask = (((Pixel)1) << planes) - 1, base = 1, dplanes -= (planes - 1);
+         --dplanes >= 0;
+         mask += mask, base += base)
+    {
+        ppix = pixels;
+        found = 0;
+        pixel = 0;
+        entries = pmap->pVisual->ColormapEntries - mask;
+        while (pixel < entries)
+	{
+    	    save = pixel;
+    	    maxp = pixel + mask + base;
+    	    /* check if all are free */
+    	    while (pixel != maxp && ent[pixel].refcnt == 0)
+    	        pixel += base;
+	    if (pixel == maxp)
+		{
+		    /* this one works */
+		    *ppix++ = save;
+		    found++;
+		    if (found == count)
+		    {
+			/* found enough, allocate them all */
+			while (--count >= 0)
+			{
+			    pixel = pixels[count];
+			    maxp = pixel + mask;
+			    while (1)
+			    {
+				ent[pixel].refcnt = AllocPrivate;
+				ent[pixel].fShared = FALSE;
+				if (pixel == maxp)
+				    break;
+				pixel += base;
+				*ppix++ = pixel;
+			    }
+			}
+			*pMask = mask;
+			return (TRUE);
+		    }
+		}
+    	    pixel = save + 1;
+    	    if (pixel & mask)
+    	        pixel += mask;
+        }
+    }
+
+    dplanes = pmap->pVisual->nplanes;
+    if (contig || planes == 1 || dplanes < 3)
+	return (FALSE);
+
+    /* this will be very slow for large maps, need a better algorithm */
+
+    /*
+       we can generate the smallest and largest numbers that fits in dplanes
+       bits and contain exactly planes bits set as follows. First, we need to
+       check that it is possible to generate such a mask at all.
+       (Non-contiguous masks need one more bit than contiguous masks). Then
+       the smallest such mask consists of the rightmost planes-1 bits set, then
+       a zero, then a one in position planes + 1. The formula is
+         (3 << (planes-1)) -1
+       The largest such masks consists of the leftmost planes-1 bits set, then
+       a zero, then a one bit in position dplanes-planes-1. If dplanes is
+       smaller than 32 (the number of bits in a word) then the formula is:
+         (1<<dplanes) - (1<<(dplanes-planes+1) + (1<<dplanes-planes-1)
+       If dplanes = 32, then we can't calculate (1<<dplanes) and we have
+       to use:
+         ( (1<<(planes-1)) - 1) << (dplanes-planes+1) + (1<<(dplanes-planes-1))
+	  
+	  << Thank you, Loretta>>>
+
+    */
+
+    finalmask =
+        (((((Pixel)1)<<(planes-1)) - 1) << (dplanes-planes+1)) +
+	  (((Pixel)1)<<(dplanes-planes-1));
+    for (mask = (((Pixel)3) << (planes -1)) - 1; mask <= finalmask; mask++)
+    {
+        /* next 3 magic statements count number of ones (HAKMEM #169) */
+        pixel = (mask >> 1) & 033333333333;
+        pixel = mask - pixel - ((pixel >> 1) & 033333333333);
+        if ((((pixel + (pixel >> 3)) & 030707070707) % 077) != planes)
+    	    continue;
+        ppix = pixels;
+        found = 0;
+        entries = pmap->pVisual->ColormapEntries - mask;
+        base = lowbit (mask);
+        for (pixel = 0; pixel < entries; pixel++)
+	{
+	    if (pixel & mask)
+	        continue;
+	    maxp = 0;
+	    /* check if all are free */
+	    while (ent[pixel + maxp].refcnt == 0)
+	    {
+		GetNextBitsOrBreak(maxp, mask, base);
+	    }
+	    if ((maxp < mask) || (ent[pixel + mask].refcnt != 0))
+		continue;
+	    /* this one works */
+	    *ppix++ = pixel;
+	    found++;
+	    if (found < count)
+		continue;
+	    /* found enough, allocate them all */
+	    while (--count >= 0)
+	    {
+		pixel = (pixels)[count];
+		maxp = 0;
+		while (1)
+		{
+		    ent[pixel + maxp].refcnt = AllocPrivate;
+		    ent[pixel + maxp].fShared = FALSE;
+		    GetNextBitsOrBreak(maxp, mask, base);
+		    *ppix++ = pixel + maxp;
+		}
+	    }
+
+	    *pMask = mask;
+	    return (TRUE);
+	}
+    }
+    return (FALSE);
+}
+
+/**
+ *
+ *  \param ppixFirst  First of the client's new pixels
+ */
+static Bool
+AllocShared (ColormapPtr pmap, Pixel *ppix, int c, int r, int g, int b, 
+             Pixel rmask, Pixel gmask, Pixel bmask, Pixel *ppixFirst)
+{
+    Pixel	*pptr, *cptr;
+    int		npix, z, npixClientNew, npixShared;
+    Pixel	basemask, base, bits, common;
+    SHAREDCOLOR *pshared, **ppshared, **psharedList;
+
+    npixClientNew = c << (r + g + b);
+    npixShared = (c << r) + (c << g) + (c << b);
+    psharedList = malloc(npixShared * sizeof(SHAREDCOLOR *));
+    if (!psharedList)
+	return FALSE;
+    ppshared = psharedList;
+    for (z = npixShared; --z >= 0; )
+    {
+	if (!(ppshared[z] = malloc(sizeof(SHAREDCOLOR))))
+	{
+	    for (z++ ; z < npixShared; z++)
+		free(ppshared[z]);
+	    return FALSE;
+	}
+    }
+    for(pptr = ppix, npix = c; --npix >= 0; pptr++)
+    {
+	basemask = ~(gmask | bmask);
+	common = *pptr & basemask;
+	if (rmask)
+	{
+	    bits = 0;
+	    base = lowbit (rmask);
+	    while(1)
+	    {
+		pshared = *ppshared++;
+		pshared->refcnt = 1 << (g + b);
+		for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)
+		{
+		    if ((*cptr & basemask) == (common | bits))
+		    {
+			pmap->red[*cptr].fShared = TRUE;
+			pmap->red[*cptr].co.shco.red = pshared;
+		    }
+		}
+		GetNextBitsOrBreak(bits, rmask, base);
+	    }
+	}
+	else
+	{
+	    pshared = *ppshared++;
+	    pshared->refcnt = 1 << (g + b);
+	    for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)
+	    {
+		if ((*cptr & basemask) == common)
+		{
+		    pmap->red[*cptr].fShared = TRUE;
+		    pmap->red[*cptr].co.shco.red = pshared;
+		}
+	    }
+	}
+	basemask = ~(rmask | bmask);
+	common = *pptr & basemask;
+	if (gmask)
+	{
+	    bits = 0;
+	    base = lowbit (gmask);
+	    while(1)
+	    {
+		pshared = *ppshared++;
+		pshared->refcnt = 1 << (r + b);
+		for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)
+		{
+		    if ((*cptr & basemask) == (common | bits))
+		    {
+			pmap->red[*cptr].co.shco.green = pshared;
+		    }
+		}
+		GetNextBitsOrBreak(bits, gmask, base);
+	    }
+	}
+	else
+	{
+	    pshared = *ppshared++;
+	    pshared->refcnt = 1 << (g + b);
+	    for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)
+	    {
+		if ((*cptr & basemask) == common)
+		{
+		    pmap->red[*cptr].co.shco.green = pshared;
+		}
+	    }
+	}
+	basemask = ~(rmask | gmask);
+	common = *pptr & basemask;
+	if (bmask)
+	{
+	    bits = 0;
+	    base = lowbit (bmask);
+	    while(1)
+	    {
+		pshared = *ppshared++;
+		pshared->refcnt = 1 << (r + g);
+		for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)
+		{
+		    if ((*cptr & basemask) == (common | bits))
+		    {
+			pmap->red[*cptr].co.shco.blue = pshared;
+		    }
+		}
+		GetNextBitsOrBreak(bits, bmask, base);
+	    }
+	}
+	else
+	{
+	    pshared = *ppshared++;
+	    pshared->refcnt = 1 << (g + b);
+	    for (cptr = ppixFirst, z = npixClientNew; --z >= 0; cptr++)
+	    {
+		if ((*cptr & basemask) == common)
+		{
+		    pmap->red[*cptr].co.shco.blue = pshared;
+		}
+	    }
+	}
+    }
+    free(psharedList);
+    return TRUE;
+}
+
+
+/** FreeColors
+ * Free colors and/or cells (probably slow for large numbers) 
+ */
+int
+FreeColors (ColormapPtr pmap, int client, int count, Pixel *pixels, Pixel mask)
+{
+    int		rval, result, class;
+    Pixel	rmask;
+
+    class = pmap->class;
+    if (pmap->flags & AllAllocated)
+	return(BadAccess);
+    if ((class | DynamicClass) == DirectColor)
+    {
+	rmask = mask & RGBMASK(pmap->pVisual);
+        result = FreeCo(pmap, client, REDMAP, count, pixels,
+			mask & pmap->pVisual->redMask);
+	/* If any of the three calls fails, we must report that, if more
+	 * than one fails, it's ok that we report the last one */
+        rval = FreeCo(pmap, client, GREENMAP, count, pixels,
+		      mask & pmap->pVisual->greenMask);
+	if(rval != Success)
+	    result = rval;
+	rval = FreeCo(pmap, client, BLUEMAP, count, pixels,
+		      mask & pmap->pVisual->blueMask);
+	if(rval != Success)
+	    result = rval;
+    }
+    else
+    {
+	rmask = mask & ((((Pixel)1) << pmap->pVisual->nplanes) - 1);
+        result = FreeCo(pmap, client, PSEUDOMAP, count, pixels, rmask);
+    }
+    if ((mask != rmask) && count)
+    {
+	clients[client]->errorValue = *pixels | mask;
+	result = BadValue;
+    }
+    /* XXX should worry about removing any RT_CMAPENTRY resource */
+    return (result);
+}
+
+/**
+ * Helper for FreeColors -- frees all combinations of *newpixels and mask bits
+ * which the client has allocated in channel colormap cells of pmap.
+ * doesn't change newpixels if it doesn't need to 
+ *
+ *  \param pmap   which colormap head
+ *  \param color  which sub-map, eg, RED, BLUE, PSEUDO
+ *  \param npixIn number of pixels passed in
+ *  \param ppixIn number of base pixels
+ *  \param mask   mask client gave us
+ */
+static int
+FreeCo (ColormapPtr pmap, int client, int color, int npixIn, Pixel *ppixIn, Pixel mask)
+{
+    Pixel	*ppixClient, pixTest;
+    int		npixClient, npixNew, npix;
+    Pixel	bits, base, cmask, rgbbad;
+    Pixel	*pptr, *cptr;
+    int 	n, zapped;
+    int		errVal = Success;
+    int		offset, numents;
+
+    if (npixIn == 0)
+        return (errVal);
+    bits = 0;
+    zapped = 0;
+    base = lowbit (mask);
+
+    switch(color)
+    {
+      case REDMAP:
+	cmask = pmap->pVisual->redMask;
+	rgbbad = ~RGBMASK(pmap->pVisual);
+	offset = pmap->pVisual->offsetRed;
+	numents = (cmask >> offset) + 1;
+	ppixClient = pmap->clientPixelsRed[client];
+	npixClient = pmap->numPixelsRed[client];
+	break;
+      case GREENMAP:
+	cmask = pmap->pVisual->greenMask;
+	rgbbad = ~RGBMASK(pmap->pVisual);
+	offset = pmap->pVisual->offsetGreen;
+	numents = (cmask >> offset) + 1;
+	ppixClient = pmap->clientPixelsGreen[client];
+	npixClient = pmap->numPixelsGreen[client];
+	break;
+      case BLUEMAP:
+	cmask = pmap->pVisual->blueMask;
+	rgbbad = ~RGBMASK(pmap->pVisual);
+	offset = pmap->pVisual->offsetBlue;
+	numents = (cmask >> offset) + 1;
+	ppixClient = pmap->clientPixelsBlue[client];
+	npixClient = pmap->numPixelsBlue[client];
+	break;
+      default:	/* so compiler can see that everything gets initialized */
+      case PSEUDOMAP:
+	cmask = ~((Pixel)0);
+	rgbbad = 0;
+	offset = 0;
+	numents = pmap->pVisual->ColormapEntries;
+	ppixClient = pmap->clientPixelsRed[client];
+	npixClient = pmap->numPixelsRed[client];
+	break;
+    }
+
+
+    /* zap all pixels which match */
+    while (1)
+    {
+        /* go through pixel list */
+        for (pptr = ppixIn, n = npixIn; --n >= 0; pptr++)
+	{
+	    pixTest = ((*pptr | bits) & cmask) >> offset;
+	    if ((pixTest >= numents) || (*pptr & rgbbad))
+	    {
+		clients[client]->errorValue = *pptr | bits;
+		errVal = BadValue;
+		continue;
+	    }
+
+	    /* find match in client list */
+	    for (cptr = ppixClient, npix = npixClient;
+	         --npix >= 0 && *cptr != pixTest;
+		 cptr++) ;
+
+	    if (npix >= 0)
+	    {
+		if (pmap->class & DynamicClass)
+		{
+		    FreeCell(pmap, pixTest, color);
+		}
+		*cptr = ~((Pixel)0);
+		zapped++;
+	    }
+	    else
+		errVal = BadAccess;
+	}
+        /* generate next bits value */
+	GetNextBitsOrBreak(bits, mask, base);
+    }
+
+    /* delete freed pixels from client pixel list */
+    if (zapped)
+    {
+        npixNew = npixClient - zapped;
+        if (npixNew)
+	{
+	    /* Since the list can only get smaller, we can do a copy in
+	     * place and then realloc to a smaller size */
+    	    pptr = cptr = ppixClient;
+
+	    /* If we have all the new pixels, we don't have to examine the
+	     * rest of the old ones */
+	    for(npix = 0; npix < npixNew; cptr++)
+	    {
+    	        if (*cptr != ~((Pixel)0))
+		{
+    		    *pptr++ = *cptr;
+		    npix++;
+    	        }
+    	    }
+	    pptr = (Pixel *)realloc(ppixClient, npixNew * sizeof(Pixel));
+	    if (pptr)
+		ppixClient = pptr;
+	    npixClient = npixNew;
+        }
+	else
+	{
+	    npixClient = 0;
+	    free(ppixClient);
+    	    ppixClient = (Pixel *)NULL;
+	}
+	switch(color)
+	{
+	  case PSEUDOMAP:
+	  case REDMAP:
+	    pmap->clientPixelsRed[client] = ppixClient;
+	    pmap->numPixelsRed[client] = npixClient;
+	    break;
+	  case GREENMAP:
+	    pmap->clientPixelsGreen[client] = ppixClient;
+	    pmap->numPixelsGreen[client] = npixClient;
+	    break;
+	  case BLUEMAP:
+	    pmap->clientPixelsBlue[client] = ppixClient;
+	    pmap->numPixelsBlue[client] = npixClient;
+	    break;
+	}
+    }
+    return (errVal);
+}
+
+
+
+/* Redefine color values */
+int
+StoreColors (ColormapPtr pmap, int count, xColorItem *defs, ClientPtr client)
+{
+    Pixel 	pix;
+    xColorItem *pdef;
+    EntryPtr 	pent, pentT, pentLast;
+    VisualPtr	pVisual;
+    SHAREDCOLOR		*pred, *pgreen, *pblue;
+    int			n, ChgRed, ChgGreen, ChgBlue, idef;
+    int			class, errVal = Success;
+    int			ok;
+
+
+    class = pmap->class;
+    if(!(class & DynamicClass) && !(pmap->flags & BeingCreated))
+    {
+	return(BadAccess);
+    }
+    pVisual = pmap->pVisual;
+
+    idef = 0;
+    if((class | DynamicClass) == DirectColor)
+    {
+	int numred, numgreen, numblue;
+	Pixel rgbbad;
+
+	numred = NUMRED(pVisual);
+	numgreen = NUMGREEN(pVisual);
+	numblue = NUMBLUE(pVisual);
+	rgbbad = ~RGBMASK(pVisual);
+        for (pdef = defs, n = 0; n < count; pdef++, n++)
+	{
+	    ok = TRUE;
+            (*pmap->pScreen->ResolveColor)
+	        (&pdef->red, &pdef->green, &pdef->blue, pmap->pVisual);
+
+	    if (pdef->pixel & rgbbad)
+	    {
+		errVal = BadValue;
+		client->errorValue = pdef->pixel;
+		continue;
+	    }
+	    pix = (pdef->pixel & pVisual->redMask) >> pVisual->offsetRed;
+	    if (pix >= numred)
+	    {
+		errVal = BadValue;
+		ok = FALSE;
+	    }
+	    else if (pmap->red[pix].refcnt != AllocPrivate)
+	    {
+		errVal = BadAccess;
+		ok = FALSE;
+	    }
+	    else if (pdef->flags & DoRed)
+	    {
+		pmap->red[pix].co.local.red = pdef->red;
+	    }
+	    else
+	    {
+		pdef->red = pmap->red[pix].co.local.red;
+	    }
+
+	    pix = (pdef->pixel & pVisual->greenMask) >> pVisual->offsetGreen;
+	    if (pix >= numgreen)
+	    {
+		errVal = BadValue;
+		ok = FALSE;
+	    }
+	    else if (pmap->green[pix].refcnt != AllocPrivate)
+	    {
+		errVal = BadAccess;
+		ok = FALSE;
+	    }
+	    else if (pdef->flags & DoGreen)
+	    {
+		pmap->green[pix].co.local.green = pdef->green;
+	    }
+	    else
+	    {
+		pdef->green = pmap->green[pix].co.local.green;
+	    }
+
+	    pix = (pdef->pixel & pVisual->blueMask) >> pVisual->offsetBlue;
+	    if (pix >= numblue)
+	    {
+		errVal = BadValue;
+		ok = FALSE;
+	    }
+	    else if (pmap->blue[pix].refcnt != AllocPrivate)
+	    {
+		errVal = BadAccess;
+		ok = FALSE;
+	    }
+	    else if (pdef->flags & DoBlue)
+	    {
+		pmap->blue[pix].co.local.blue = pdef->blue;
+	    }
+	    else
+	    {
+		pdef->blue = pmap->blue[pix].co.local.blue;
+	    }
+	    /* If this is an o.k. entry, then it gets added to the list
+	     * to be sent to the hardware.  If not, skip it.  Once we've
+	     * skipped one, we have to copy all the others.
+	     */
+	    if(ok)
+	    {
+		if(idef != n)
+		    defs[idef] = defs[n];
+		idef++;
+	    } else
+		client->errorValue = pdef->pixel;
+	}
+    }
+    else
+    {
+        for (pdef = defs, n = 0; n < count; pdef++, n++)
+	{
+
+	    ok = TRUE;
+	    if (pdef->pixel >= pVisual->ColormapEntries)
+	    {
+		client->errorValue = pdef->pixel;
+	        errVal = BadValue;
+		ok = FALSE;
+	    }
+	    else if (pmap->red[pdef->pixel].refcnt != AllocPrivate)
+	    {
+		errVal = BadAccess;
+		ok = FALSE;
+	    }
+
+	    /* If this is an o.k. entry, then it gets added to the list
+	     * to be sent to the hardware.  If not, skip it.  Once we've
+	     * skipped one, we have to copy all the others.
+	     */
+	    if(ok)
+	    {
+		if(idef != n)
+		    defs[idef] = defs[n];
+		idef++;
+	    }
+	    else
+		continue;
+
+            (*pmap->pScreen->ResolveColor)
+	        (&pdef->red, &pdef->green, &pdef->blue, pmap->pVisual);
+
+	    pent = &pmap->red[pdef->pixel];
+
+	    if(pdef->flags & DoRed)
+	    {
+		if(pent->fShared)
+		{
+		    pent->co.shco.red->color = pdef->red;
+		    if (pent->co.shco.red->refcnt > 1)
+			ok = FALSE;
+		}
+		else
+		    pent->co.local.red = pdef->red;
+	    }
+	    else
+	    {
+		if(pent->fShared)
+		    pdef->red = pent->co.shco.red->color;
+		else
+		    pdef->red = pent->co.local.red;
+	    }
+	    if(pdef->flags & DoGreen)
+	    {
+		if(pent->fShared)
+		{
+		    pent->co.shco.green->color = pdef->green;
+		    if (pent->co.shco.green->refcnt > 1)
+			ok = FALSE;
+		}
+		else
+		    pent->co.local.green = pdef->green;
+	    }
+	    else
+	    {
+		if(pent->fShared)
+		    pdef->green = pent->co.shco.green->color;
+		else
+		    pdef->green = pent->co.local.green;
+	    }
+	    if(pdef->flags & DoBlue)
+	    {
+		if(pent->fShared)
+		{
+		    pent->co.shco.blue->color = pdef->blue;
+		    if (pent->co.shco.blue->refcnt > 1)
+			ok = FALSE;
+		}
+		else
+		    pent->co.local.blue = pdef->blue;
+	    }
+	    else
+	    {
+		if(pent->fShared)
+		    pdef->blue = pent->co.shco.blue->color;
+		else
+		    pdef->blue = pent->co.local.blue;
+	    }
+
+	    if(!ok)
+	    {
+                /* have to run through the colormap and change anybody who
+		 * shares this value */
+	        pred = pent->co.shco.red;
+	        pgreen = pent->co.shco.green;
+	        pblue = pent->co.shco.blue;
+	        ChgRed = pdef->flags & DoRed;
+	        ChgGreen = pdef->flags & DoGreen;
+	        ChgBlue = pdef->flags & DoBlue;
+	        pentLast = pmap->red + pVisual->ColormapEntries;
+
+	        for(pentT = pmap->red; pentT < pentLast; pentT++)
+		{
+		    if(pentT->fShared && (pentT != pent))
+		    {
+			xColorItem	defChg;
+
+			/* There are, alas, devices in this world too dumb
+			 * to read their own hardware colormaps.  Sick, but
+			 * true.  So we're going to be really nice and load
+			 * the xColorItem with the proper value for all the
+			 * fields.  We will only set the flags for those
+			 * fields that actually change.  Smart devices can
+			 * arrange to change only those fields.  Dumb devices
+			 * can rest assured that we have provided for them,
+			 * and can change all three fields */
+
+			defChg.flags = 0;
+			if(ChgRed && pentT->co.shco.red == pred)
+			{
+			    defChg.flags |= DoRed;
+			}
+			if(ChgGreen && pentT->co.shco.green == pgreen)
+			{
+			    defChg.flags |= DoGreen;
+			}
+			if(ChgBlue && pentT->co.shco.blue == pblue)
+			{
+			    defChg.flags |= DoBlue;
+			}
+			if(defChg.flags != 0)
+			{
+			    defChg.pixel = pentT - pmap->red;
+			    defChg.red = pentT->co.shco.red->color;
+			    defChg.green = pentT->co.shco.green->color;
+			    defChg.blue = pentT->co.shco.blue->color;
+			    (*pmap->pScreen->StoreColors) (pmap, 1, &defChg);
+			}
+		    }
+		}
+
+	    }
+	}
+    }
+    /* Note that we use idef, the count of acceptable entries, and not
+     * count, the count of proposed entries */
+    if (idef != 0)
+	( *pmap->pScreen->StoreColors) (pmap, idef, defs);
+    return (errVal);
+}
+
+int
+IsMapInstalled(Colormap map, WindowPtr pWin)
+{
+    Colormap	*pmaps;
+    int		imap, nummaps, found;
+
+    pmaps = malloc(pWin->drawable.pScreen->maxInstalledCmaps*sizeof(Colormap));
+    if(!pmaps)
+	return(FALSE);
+    nummaps = (*pWin->drawable.pScreen->ListInstalledColormaps)
+        (pWin->drawable.pScreen, pmaps);
+    found = FALSE;
+    for(imap = 0; imap < nummaps; imap++)
+    {
+	if(pmaps[imap] == map)
+	{
+	    found = TRUE;
+	    break;
+	}
+    }
+    free(pmaps);
+    return (found);
+}
+
+struct colormap_lookup_data {
+    ScreenPtr pScreen;
+    VisualPtr visuals;
+};
+
+static void _colormap_find_resource(pointer value, XID id,
+				    pointer cdata)
+{
+    struct colormap_lookup_data *cmap_data = cdata;
+    VisualPtr visuals = cmap_data->visuals;
+    ScreenPtr pScreen = cmap_data->pScreen;
+    ColormapPtr cmap = value;
+    int j;
+
+    if (pScreen != cmap->pScreen)
+	return;
+
+    j = cmap->pVisual - pScreen->visuals;
+    cmap->pVisual = &visuals[j];
+}
+
+/* something has realloced the visuals, instead of breaking
+   ABI fix it up here - glx and compsite did this wrong */
+Bool
+ResizeVisualArray(ScreenPtr pScreen, int new_visual_count,
+		  DepthPtr depth)
+{
+    struct colormap_lookup_data cdata;
+    int numVisuals;
+    VisualPtr visuals;
+    XID *vids, vid;
+    int first_new_vid, first_new_visual, i;
+
+    first_new_vid = depth->numVids;
+    first_new_visual = pScreen->numVisuals;
+
+    vids = realloc(depth->vids, (depth->numVids + new_visual_count) * sizeof(XID));
+    if (!vids)
+        return FALSE;
+
+    /* its realloced now no going back if we fail the next one */
+    depth->vids = vids;
+
+    numVisuals = pScreen->numVisuals + new_visual_count;
+    visuals = realloc(pScreen->visuals, numVisuals * sizeof(VisualRec));
+    if (!visuals) {
+	return FALSE;
+    }
+
+    cdata.visuals = visuals;
+    cdata.pScreen = pScreen;
+    FindClientResourcesByType(serverClient, RT_COLORMAP, _colormap_find_resource, &cdata);
+
+    pScreen->visuals = visuals;
+
+    for (i = 0; i < new_visual_count; i++) {
+	vid = FakeClientID(0);
+	pScreen->visuals[first_new_visual + i].vid = vid;
+	vids[first_new_vid + i] = vid;
+    }
+
+    depth->numVids += new_visual_count;
+    pScreen->numVisuals += new_visual_count;
+
+    return TRUE;
+}
diff --git a/xorg-server/dix/gc.c b/xorg-server/dix/gc.c
index b738d4112..6281f25cd 100644
--- a/xorg-server/dix/gc.c
+++ b/xorg-server/dix/gc.c
@@ -1,1158 +1,1159 @@
-/***********************************************************

-

-Copyright 1987, 1998  The Open Group

-

-Permission to use, copy, modify, distribute, and sell this software and its

-documentation for any purpose is hereby granted without fee, provided that

-the above copyright notice appear in all copies and that both that

-copyright notice and this permission notice appear in supporting

-documentation.

-

-The above copyright notice and this permission notice shall be included in

-all copies or substantial portions of the Software.

-

-THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR

-IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,

-FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE

-OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN

-AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN

-CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

-

-Except as contained in this notice, the name of The Open Group shall not be

-used in advertising or otherwise to promote the sale, use or other dealings

-in this Software without prior written authorization from The Open Group.

-

-

-Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.

-

-                        All Rights Reserved

-

-Permission to use, copy, modify, and distribute this software and its 

-documentation for any purpose and without fee is hereby granted, 

-provided that the above copyright notice appear in all copies and that

-both that copyright notice and this permission notice appear in 

-supporting documentation, and that the name of Digital not be

-used in advertising or publicity pertaining to distribution of the

-software without specific, written prior permission.  

-

-DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING

-ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL

-DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR

-ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,

-WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,

-ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS

-SOFTWARE.

-

-******************************************************************/

-

-

-#ifdef HAVE_DIX_CONFIG_H

-#include <dix-config.h>

-#endif

-

-#include <X11/X.h>

-#include <X11/Xmd.h>

-#include <X11/Xproto.h>

-#include "misc.h"

-#include "resource.h"

-#include "gcstruct.h"

-#include "pixmapstr.h"

-#include "dixfontstr.h"

-#include "scrnintstr.h"

-#include "region.h"

-

-#include "privates.h"

-#include "dix.h"

-#include "xace.h"

-#include <assert.h>

-

-extern FontPtr defaultFont;

-

-static Bool CreateDefaultTile(GCPtr pGC);

-

-static unsigned char DefaultDash[2] = {4, 4};

-

-void

-ValidateGC(DrawablePtr pDraw, GC *pGC)

-{

-    (*pGC->funcs->ValidateGC) (pGC, pGC->stateChanges, pDraw);

-    pGC->stateChanges = 0;

-    pGC->serialNumber = pDraw->serialNumber;

-}

-

-

-/*

- * ChangeGC/ChangeGCXIDs:

- *

- * The client performing the gc change must be passed so that access

- * checks can be performed on any tiles, stipples, or fonts that are

- * specified.  ddxen can call this too; they should normally pass

- * NullClient for the client since any access checking should have

- * already been done at a higher level.

- * 

- * If you have any XIDs, you must use ChangeGCXIDs:

- * 

- *     CARD32 v[2];

- *     v[0] = FillTiled;

- *     v[1] = pid;

- *     ChangeGCXIDs(client, pGC, GCFillStyle|GCTile, v);

- * 

- * However, if you need to pass a pointer to a pixmap or font, you must

- * use ChangeGC:

- * 

- *     ChangeGCVal v[2];

- *     v[0].val = FillTiled;

- *     v[1].ptr = pPixmap;

- *     ChangeGC(client, pGC, GCFillStyle|GCTile, v);

- * 

- * If you have neither XIDs nor pointers, you can use either function,

- * but ChangeGC will do less work.

- *

- *     ChangeGCVal v[2];

- *     v[0].val = foreground;

- *     v[1].val = background;

- *     ChangeGC(client, pGC, GCForeground|GCBackground, v);

- */

-

-#define NEXTVAL(_type, _var) { \

-	_var = (_type)(pUnion->val); pUnion++; \

-    }

-

-#define NEXT_PTR(_type, _var) { \

-    _var = (_type)pUnion->ptr; pUnion++; }

-

-int

-ChangeGC(ClientPtr client, GC *pGC, BITS32 mask, ChangeGCValPtr pUnion)

-{

-    BITS32 	index2;

-    int 	error = 0;

-    PixmapPtr 	pPixmap;

-    BITS32	maskQ;

-

-    assert(pUnion);

-    pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;

-

-    maskQ = mask;	/* save these for when we walk the GCque */

-    while (mask && !error) 

-    {

-	index2 = (BITS32) lowbit (mask);

-	mask &= ~index2;

-	pGC->stateChanges |= index2;

-	switch (index2)

-	{

-	    case GCFunction:

-	    {

-		CARD8 newalu;

-		NEXTVAL(CARD8, newalu);

-		if (newalu <= GXset)

-		    pGC->alu = newalu;

-		else

-		{

-		    if (client)

-			client->errorValue = newalu;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCPlaneMask:

-		NEXTVAL(unsigned long, pGC->planemask);

-		break;

-	    case GCForeground:

-		NEXTVAL(unsigned long, pGC->fgPixel);

-		/*

-		 * this is for CreateGC

-		 */

-		if (!pGC->tileIsPixel && !pGC->tile.pixmap)

-		{

-		    pGC->tileIsPixel = TRUE;

-		    pGC->tile.pixel = pGC->fgPixel;

-		}

-		break;

-	    case GCBackground:

-		NEXTVAL(unsigned long, pGC->bgPixel);

-		break;

-	    case GCLineWidth:		/* ??? line width is a CARD16 */

-		 NEXTVAL(CARD16, pGC->lineWidth);

-		break;

-	    case GCLineStyle:

-	    {

-		unsigned int newlinestyle;

-		NEXTVAL(unsigned int, newlinestyle);

-		if (newlinestyle <= LineDoubleDash)

-		    pGC->lineStyle = newlinestyle;

-		else

-		{

-		    if (client)

-			client->errorValue = newlinestyle;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCCapStyle:

-	    {

-		unsigned int newcapstyle;

-		NEXTVAL(unsigned int, newcapstyle);

-		if (newcapstyle <= CapProjecting)

-		    pGC->capStyle = newcapstyle;

-		else

-		{

-		    if (client)

-			client->errorValue = newcapstyle;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCJoinStyle:

-	    {

-		unsigned int newjoinstyle;

-		NEXTVAL(unsigned int, newjoinstyle);

-		if (newjoinstyle <= JoinBevel)

-		    pGC->joinStyle = newjoinstyle;

-		else

-		{

-		    if (client)

-			client->errorValue = newjoinstyle;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCFillStyle:

-	    {

-		unsigned int newfillstyle;

-		NEXTVAL(unsigned int, newfillstyle);

-		if (newfillstyle <= FillOpaqueStippled)

-		    pGC->fillStyle = newfillstyle;

-		else

-		{

-		    if (client)

-			client->errorValue = newfillstyle;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCFillRule:

-	    {

-		unsigned int newfillrule;

-		NEXTVAL(unsigned int, newfillrule);

-		if (newfillrule <= WindingRule)

-		    pGC->fillRule = newfillrule;

-		else

-		{

-		    if (client)

-			client->errorValue = newfillrule;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCTile:

-		NEXT_PTR(PixmapPtr, pPixmap);

-		if ((pPixmap->drawable.depth != pGC->depth) ||

-		    (pPixmap->drawable.pScreen != pGC->pScreen))

-		{

-		    error = BadMatch;

-		}

-		else

-		{

-		    pPixmap->refcnt++;

-		    if (!pGC->tileIsPixel)

-			(* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);

-		    pGC->tileIsPixel = FALSE;

-		    pGC->tile.pixmap = pPixmap;

-		}

-		break;

-	    case GCStipple:

-		NEXT_PTR(PixmapPtr, pPixmap);

-		if ((pPixmap->drawable.depth != 1) ||

-		    (pPixmap->drawable.pScreen != pGC->pScreen))

-		{

-		    error = BadMatch;

-		}

-		else

-		{

-		    pPixmap->refcnt++;

-		    if (pGC->stipple)

-			(* pGC->pScreen->DestroyPixmap)(pGC->stipple);

-		    pGC->stipple = pPixmap;

-		}

-		break;

-	    case GCTileStipXOrigin:

-		NEXTVAL(INT16, pGC->patOrg.x);

-		break;

-	    case GCTileStipYOrigin:

-		NEXTVAL(INT16, pGC->patOrg.y);

-		break;

-	    case GCFont:

-    	    {

-		FontPtr	pFont;

-		NEXT_PTR(FontPtr, pFont);

-		pFont->refcnt++;

-		if (pGC->font)

-		    CloseFont(pGC->font, (Font)0);

-		pGC->font = pFont;

-		break;

-	    }

-	    case GCSubwindowMode:

-	    {

-		unsigned int newclipmode;

-		NEXTVAL(unsigned int, newclipmode);

-		if (newclipmode <= IncludeInferiors)

-		    pGC->subWindowMode = newclipmode;

-		else

-		{

-		    if (client)

-			client->errorValue = newclipmode;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCGraphicsExposures:

-    	    {

-		unsigned int newge;

-		NEXTVAL(unsigned int, newge);

-		if (newge <= xTrue)

-		    pGC->graphicsExposures = newge;

-		else

-		{

-		    if (client)

-			client->errorValue = newge;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    case GCClipXOrigin:

-		NEXTVAL(INT16, pGC->clipOrg.x);

-		break;

-	    case GCClipYOrigin:

-		NEXTVAL(INT16, pGC->clipOrg.y);

-		break;

-	    case GCClipMask:

-		NEXT_PTR(PixmapPtr, pPixmap);

-		if (pPixmap)

-		{

-		    if ((pPixmap->drawable.depth != 1) ||

-			(pPixmap->drawable.pScreen != pGC->pScreen))

-		    {

-			error = BadMatch;

-			break;

-		    }

-		    pPixmap->refcnt++;

-		}

-		(*pGC->funcs->ChangeClip)(pGC, pPixmap ? CT_PIXMAP : CT_NONE,

-					  (pointer)pPixmap, 0);

-		break;

-	    case GCDashOffset:

-		NEXTVAL(INT16, pGC->dashOffset);

-		break;

-	    case GCDashList:

-	    {

-		CARD8 newdash;

-		NEXTVAL(CARD8, newdash);

-		if (newdash == 4)

-		{

-		    if (pGC->dash != DefaultDash)

-		    {

-			free(pGC->dash);

-			pGC->numInDashList = 2;

-			pGC->dash = DefaultDash;

-		    }

-		}

-		else if (newdash != 0)

- 		{

-		    unsigned char *dash;

-

-		    dash = malloc(2 * sizeof(unsigned char));

-		    if (dash)

-		    {

-			if (pGC->dash != DefaultDash)

-			    free(pGC->dash);

-			pGC->numInDashList = 2;

-			pGC->dash = dash;

-			dash[0] = newdash;

-			dash[1] = newdash;

-		    }

-		    else

-			error = BadAlloc;

-		}

- 		else

-		{

-		   if (client)

-			client->errorValue = newdash;

-		   error = BadValue;

-		}

-		break;

-	    }

-	    case GCArcMode:

-	    {

-		unsigned int newarcmode;

-		NEXTVAL(unsigned int, newarcmode);

-		if (newarcmode <= ArcPieSlice)

-		    pGC->arcMode = newarcmode;

-		else

-		{

-		    if (client)

-			client->errorValue = newarcmode;

-		    error = BadValue;

-		}

-		break;

-	    }

-	    default:

-		if (client)

-		    client->errorValue = maskQ;

-		error = BadValue;

-		break;

-	}

-    } /* end while mask && !error */

-

-    if (pGC->fillStyle == FillTiled && pGC->tileIsPixel)

-    {

-	if (!CreateDefaultTile (pGC))

-	{

-	    pGC->fillStyle = FillSolid;

-	    error = BadAlloc;

-	}

-    }

-    (*pGC->funcs->ChangeGC)(pGC, maskQ);

-    return error;

-}

-

-#undef NEXTVAL

-#undef NEXT_PTR

-

-static const struct {

-    BITS32 mask;

-    RESTYPE type;

-    Mask access_mode;

-} xidfields[] = {

-    { GCTile, RT_PIXMAP, DixReadAccess },

-    { GCStipple, RT_PIXMAP, DixReadAccess },

-    { GCFont, RT_FONT, DixUseAccess },

-    { GCClipMask, RT_PIXMAP, DixReadAccess },

-};

-

-int

-ChangeGCXIDs(ClientPtr client, GC *pGC, BITS32 mask, CARD32 *pC32)

-{

-    ChangeGCVal vals[GCLastBit + 1];

-    int i;

-    if (mask & ~GCAllBits)

-    {

-	client->errorValue = mask;

-	return BadValue;

-    }

-    for (i = Ones(mask); i--; )

-	vals[i].val = pC32[i];

-    for (i = 0; i < sizeof(xidfields) / sizeof(*xidfields); ++i)

-    {

-	int offset, rc;

-	if (!(mask & xidfields[i].mask))

-	    continue;

-	offset = Ones(mask & (xidfields[i].mask - 1));

-	if (xidfields[i].mask == GCClipMask && vals[offset].val == None)

-	{

-	    vals[offset].ptr = NullPixmap;

-	    continue;

-	}

-	rc = dixLookupResourceByType(&vals[offset].ptr, vals[offset].val,

-		xidfields[i].type, client, xidfields[i].access_mode);

-	if (rc != Success)

-	{

-	    client->errorValue = vals[offset].val;

-	    if (rc == BadValue)

-		rc = (xidfields[i].type == RT_PIXMAP) ? BadPixmap : BadFont;

-	    return rc;

-	}

-    }

-    return ChangeGC(client, pGC, mask, vals);

-}

-

-/* CreateGC(pDrawable, mask, pval, pStatus)

-   creates a default GC for the given drawable, using mask to fill

-   in any non-default values.

-   Returns a pointer to the new GC on success, NULL otherwise.

-   returns status of non-default fields in pStatus

-BUG:

-   should check for failure to create default tile

-

-*/

-GCPtr

-CreateGC(DrawablePtr pDrawable, BITS32 mask, XID *pval, int *pStatus,

-	 XID gcid, ClientPtr client)

-{

-    GCPtr pGC;

-

-    pGC = malloc(sizeof(GC));

-    if (!pGC)

-    {

-	*pStatus = BadAlloc;

-	return (GCPtr)NULL;

-    }

-

-    pGC->pScreen = pDrawable->pScreen;

-    pGC->depth = pDrawable->depth;

-    pGC->alu = GXcopy; /* dst <- src */

-    pGC->planemask = ~0;

-    pGC->serialNumber = GC_CHANGE_SERIAL_BIT;

-    pGC->funcs = 0;

-    pGC->devPrivates = NULL;

-    pGC->fgPixel = 0;

-    pGC->bgPixel = 1;

-    pGC->lineWidth = 0;

-    pGC->lineStyle = LineSolid;

-    pGC->capStyle = CapButt;

-    pGC->joinStyle = JoinMiter;

-    pGC->fillStyle = FillSolid;

-    pGC->fillRule = EvenOddRule;

-    pGC->arcMode = ArcPieSlice;

-    pGC->tile.pixel = 0;

-    pGC->tile.pixmap = NullPixmap;

-    if (mask & GCForeground)

-    {

-	/*

-	 * magic special case -- ChangeGC checks for this condition

-	 * and snags the Foreground value to create a pseudo default-tile

-	 */

-	pGC->tileIsPixel = FALSE;

-    }

-    else

-    {

-	pGC->tileIsPixel = TRUE;

-    }

-

-    pGC->patOrg.x = 0;

-    pGC->patOrg.y = 0;

-    pGC->subWindowMode = ClipByChildren;

-    pGC->graphicsExposures = TRUE;

-    pGC->clipOrg.x = 0;

-    pGC->clipOrg.y = 0;

-    pGC->clientClipType = CT_NONE;

-    pGC->clientClip = (pointer)NULL;

-    pGC->numInDashList = 2;

-    pGC->dash = DefaultDash;

-    pGC->dashOffset = 0;

-    pGC->lastWinOrg.x = 0;

-    pGC->lastWinOrg.y = 0;

-

-    /* use the default font and stipple */

-    pGC->font = defaultFont;

-    defaultFont->refcnt++;

-    pGC->stipple = pGC->pScreen->PixmapPerDepth[0];

-    pGC->stipple->refcnt++;

-

-    /* security creation/labeling check */

-    *pStatus = XaceHook(XACE_RESOURCE_ACCESS, client, gcid, RT_GC, pGC,

-			RT_NONE, NULL, DixCreateAccess|DixSetAttrAccess);

-    if (*pStatus != Success)

-	goto out;

-

-    pGC->stateChanges = GCAllBits;

-    if (!(*pGC->pScreen->CreateGC)(pGC))

-	*pStatus = BadAlloc;

-    else if (mask)

-        *pStatus = ChangeGCXIDs(client, pGC, mask, pval);

-    else

-	*pStatus = Success;

-

-out:

-    if (*pStatus != Success)

-    {

-	if (!pGC->tileIsPixel && !pGC->tile.pixmap)

-	    pGC->tileIsPixel = TRUE; /* undo special case */

-	FreeGC(pGC, (XID)0);

-	pGC = (GCPtr)NULL;

-    }

-

-    return (pGC);

-}

-

-static Bool

-CreateDefaultTile (GCPtr pGC)

-{

-    ChangeGCVal	tmpval[3];

-    PixmapPtr 	pTile;

-    GCPtr	pgcScratch;

-    xRectangle	rect;

-    CARD16	w, h;

-

-    w = 1;

-    h = 1;

-    (*pGC->pScreen->QueryBestSize)(TileShape, &w, &h, pGC->pScreen);

-    pTile = (PixmapPtr)

-	    (*pGC->pScreen->CreatePixmap)(pGC->pScreen,

-					  w, h, pGC->depth, 0);

-    pgcScratch = GetScratchGC(pGC->depth, pGC->pScreen);

-    if (!pTile || !pgcScratch)

-    {

-	if (pTile)

-	    (*pTile->drawable.pScreen->DestroyPixmap)(pTile);

-	if (pgcScratch)

-	    FreeScratchGC(pgcScratch);

-	return FALSE;

-    }

-    tmpval[0].val = GXcopy;

-    tmpval[1].val = pGC->tile.pixel;

-    tmpval[2].val = FillSolid;

-    (void)ChangeGC(NullClient, pgcScratch, GCFunction | GCForeground | GCFillStyle, tmpval);

-    ValidateGC((DrawablePtr)pTile, pgcScratch);

-    rect.x = 0;

-    rect.y = 0;

-    rect.width = w;

-    rect.height = h;

-    (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pTile, pgcScratch, 1, &rect);

-    /* Always remember to free the scratch graphics context after use. */

-    FreeScratchGC(pgcScratch);

-

-    pGC->tileIsPixel = FALSE;

-    pGC->tile.pixmap = pTile;

-    return TRUE;

-}

-

-int

-CopyGC(GC *pgcSrc, GC *pgcDst, BITS32 mask)

-{

-    BITS32	index2;

-    BITS32	maskQ;

-    int 	error = 0;

-

-    if (pgcSrc == pgcDst)

-	return Success;

-    pgcDst->serialNumber |= GC_CHANGE_SERIAL_BIT;

-    pgcDst->stateChanges |= mask;

-    maskQ = mask;

-    while (mask)

-    {

-	index2 = (BITS32) lowbit (mask);

-	mask &= ~index2;

-	switch (index2)

-	{

-	    case GCFunction:

-		pgcDst->alu = pgcSrc->alu;

-		break;

-	    case GCPlaneMask:

-		pgcDst->planemask = pgcSrc->planemask;

-		break;

-	    case GCForeground:

-		pgcDst->fgPixel = pgcSrc->fgPixel;

-		break;

-	    case GCBackground:

-		pgcDst->bgPixel = pgcSrc->bgPixel;

-		break;

-	    case GCLineWidth:

-		pgcDst->lineWidth = pgcSrc->lineWidth;

-		break;

-	    case GCLineStyle:

-		pgcDst->lineStyle = pgcSrc->lineStyle;

-		break;

-	    case GCCapStyle:

-		pgcDst->capStyle = pgcSrc->capStyle;

-		break;

-	    case GCJoinStyle:

-		pgcDst->joinStyle = pgcSrc->joinStyle;

-		break;

-	    case GCFillStyle:

-		pgcDst->fillStyle = pgcSrc->fillStyle;

-		break;

-	    case GCFillRule:

-		pgcDst->fillRule = pgcSrc->fillRule;

-		break;

-	    case GCTile:

-		{

-		    if (EqualPixUnion(pgcDst->tileIsPixel,

-				      pgcDst->tile,

-				      pgcSrc->tileIsPixel,

-				      pgcSrc->tile))

-		    {

-			break;

-		    }

-		    if (!pgcDst->tileIsPixel)

-			(* pgcDst->pScreen->DestroyPixmap)(pgcDst->tile.pixmap);

-		    pgcDst->tileIsPixel = pgcSrc->tileIsPixel;

-		    pgcDst->tile = pgcSrc->tile;

-		    if (!pgcDst->tileIsPixel)

-		       pgcDst->tile.pixmap->refcnt++;

-		    break;

-		}

-	    case GCStipple:

-		{

-		    if (pgcDst->stipple == pgcSrc->stipple)

-			break;

-		    if (pgcDst->stipple)

-			(* pgcDst->pScreen->DestroyPixmap)(pgcDst->stipple);

-		    pgcDst->stipple = pgcSrc->stipple;

-		    if (pgcDst->stipple)

-			pgcDst->stipple->refcnt ++;

-		    break;

-		}

-	    case GCTileStipXOrigin:

-		pgcDst->patOrg.x = pgcSrc->patOrg.x;

-		break;

-	    case GCTileStipYOrigin:

-		pgcDst->patOrg.y = pgcSrc->patOrg.y;

-		break;

-	    case GCFont:

-		if (pgcDst->font == pgcSrc->font)

-		    break;

-		if (pgcDst->font)

-		    CloseFont(pgcDst->font, (Font)0);

-		if ((pgcDst->font = pgcSrc->font) != NullFont)

-		    (pgcDst->font)->refcnt++;

-		break;

-	    case GCSubwindowMode:

-		pgcDst->subWindowMode = pgcSrc->subWindowMode;

-		break;

-	    case GCGraphicsExposures:

-		pgcDst->graphicsExposures = pgcSrc->graphicsExposures;

-		break;

-	    case GCClipXOrigin:

-		pgcDst->clipOrg.x = pgcSrc->clipOrg.x;

-		break;

-	    case GCClipYOrigin:

-		pgcDst->clipOrg.y = pgcSrc->clipOrg.y;

-		break;

-	    case GCClipMask:

-		(* pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);

-		break;

-	    case GCDashOffset:

-		pgcDst->dashOffset = pgcSrc->dashOffset;

-		break;

-	    case GCDashList:

-		if (pgcSrc->dash == DefaultDash)

-		{

-		    if (pgcDst->dash != DefaultDash)

-		    {

-			free(pgcDst->dash);

-			pgcDst->numInDashList = pgcSrc->numInDashList;

-			pgcDst->dash = pgcSrc->dash;

-		    }

-		}

-		else

-		{

-		    unsigned char *dash;

-		    unsigned int i;

-

-		    dash = malloc(pgcSrc->numInDashList * sizeof(unsigned char));

-		    if (dash)

-		    {

-			if (pgcDst->dash != DefaultDash)

-			    free(pgcDst->dash);

-			pgcDst->numInDashList = pgcSrc->numInDashList;

-			pgcDst->dash = dash;

-			for (i=0; i<pgcSrc->numInDashList; i++)

-			    dash[i] = pgcSrc->dash[i];

-		    }

-		    else

-			error = BadAlloc;

-		}

-		break;

-	    case GCArcMode:

-		pgcDst->arcMode = pgcSrc->arcMode;

-		break;

-	    default:

-		FatalError ("CopyGC: Unhandled mask!\n");

-	}

-    }

-    if (pgcDst->fillStyle == FillTiled && pgcDst->tileIsPixel)

-    {

-	if (!CreateDefaultTile (pgcDst))

-	{

-	    pgcDst->fillStyle = FillSolid;

-	    error = BadAlloc;

-	}

-    }

-    (*pgcDst->funcs->CopyGC) (pgcSrc, maskQ, pgcDst);

-    return error;

-}

-

-/**

- * does the diX part of freeing the characteristics in the GC.

- *

- *  \param value  must conform to DeleteType

- */

-int

-FreeGC(pointer value, XID gid)

-{

-    GCPtr pGC = (GCPtr)value;

-

-    CloseFont(pGC->font, (Font)0);

-    (* pGC->funcs->DestroyClip)(pGC);

-

-    if (!pGC->tileIsPixel)

-	(* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);

-    if (pGC->stipple)

-	(* pGC->pScreen->DestroyPixmap)(pGC->stipple);

-

-    (*pGC->funcs->DestroyGC) (pGC);

-    if (pGC->dash != DefaultDash)

-	free(pGC->dash);

-    dixFreePrivates(pGC->devPrivates);

-    free(pGC);

-    return(Success);

-}

-

-/* CreateScratchGC(pScreen, depth)

-    like CreateGC, but doesn't do the default tile or stipple,

-since we can't create them without already having a GC.  any code

-using the tile or stipple has to set them explicitly anyway,

-since the state of the scratch gc is unknown.  This is OK

-because ChangeGC() has to be able to deal with NULL tiles and

-stipples anyway (in case the CreateGC() call has provided a 

-value for them -- we can't set the default tile until the

-client-supplied attributes are installed, since the fgPixel

-is what fills the default tile.  (maybe this comment should

-go with CreateGC() or ChangeGC().)

-*/

-

-GCPtr

-CreateScratchGC(ScreenPtr pScreen, unsigned depth)

-{

-    GCPtr pGC;

-

-    pGC = malloc(sizeof(GC));

-    if (!pGC)

-	return (GCPtr)NULL;

-

-    pGC->pScreen = pScreen;

-    pGC->depth = depth;

-    pGC->alu = GXcopy; /* dst <- src */

-    pGC->planemask = ~0;

-    pGC->serialNumber = 0;

-    pGC->devPrivates = NULL;

-    pGC->fgPixel = 0;

-    pGC->bgPixel = 1;

-    pGC->lineWidth = 0;

-    pGC->lineStyle = LineSolid;

-    pGC->capStyle = CapButt;

-    pGC->joinStyle = JoinMiter;

-    pGC->fillStyle = FillSolid;

-    pGC->fillRule = EvenOddRule;

-    pGC->arcMode = ArcPieSlice;

-    pGC->font = defaultFont;

-    if ( pGC->font)  /* necessary, because open of default font could fail */

-	pGC->font->refcnt++;

-    pGC->tileIsPixel = TRUE;

-    pGC->tile.pixel = 0;

-    pGC->tile.pixmap = NullPixmap;

-    pGC->stipple = NullPixmap;

-    pGC->patOrg.x = 0;

-    pGC->patOrg.y = 0;

-    pGC->subWindowMode = ClipByChildren;

-    pGC->graphicsExposures = TRUE;

-    pGC->clipOrg.x = 0;

-    pGC->clipOrg.y = 0;

-    pGC->clientClipType = CT_NONE;

-    pGC->dashOffset = 0;

-    pGC->numInDashList = 2;

-    pGC->dash = DefaultDash;

-    pGC->lastWinOrg.x = 0;

-    pGC->lastWinOrg.y = 0;

-

-    pGC->stateChanges = GCAllBits;

-    if (!(*pScreen->CreateGC)(pGC))

-    {

-	FreeGC(pGC, (XID)0);

-	pGC = (GCPtr)NULL;

-    }

-    return pGC;

-}

-

-void

-FreeGCperDepth(int screenNum)

-{

-    int i;

-    ScreenPtr pScreen;

-    GCPtr *ppGC;

-

-    pScreen = screenInfo.screens[screenNum];

-    ppGC = pScreen->GCperDepth;

-

-    for (i = 0; i <= pScreen->numDepths; i++)

-	(void)FreeGC(ppGC[i], (XID)0);

-    pScreen->rgf = ~0L;

-}

-

-

-Bool

-CreateGCperDepth(int screenNum)

-{

-    int i;

-    ScreenPtr pScreen;

-    DepthPtr pDepth;

-    GCPtr *ppGC;

-

-    pScreen = screenInfo.screens[screenNum];

-    pScreen->rgf = 0;

-    ppGC = pScreen->GCperDepth;

-    /* do depth 1 separately because it's not included in list */

-    if (!(ppGC[0] = CreateScratchGC(pScreen, 1)))

-	return FALSE;

-    ppGC[0]->graphicsExposures = FALSE;

-    /* Make sure we don't overflow GCperDepth[] */

-    if( pScreen->numDepths > MAXFORMATS )

-	    return FALSE;

-

-    pDepth = pScreen->allowedDepths;

-    for (i=0; i<pScreen->numDepths; i++, pDepth++)

-    {

-	if (!(ppGC[i+1] = CreateScratchGC(pScreen, pDepth->depth)))

-	{

-	    for (; i >= 0; i--)

-		(void)FreeGC(ppGC[i], (XID)0);

-	    return FALSE;

-	}

-	ppGC[i+1]->graphicsExposures = FALSE;

-    }

-    return TRUE;

-}

-

-Bool

-CreateDefaultStipple(int screenNum)

-{

-    ScreenPtr pScreen;

-    ChangeGCVal tmpval[3];

-    xRectangle rect;

-    CARD16 w, h;

-    GCPtr pgcScratch;

-

-    pScreen = screenInfo.screens[screenNum];

-

-    w = 16;

-    h = 16;

-    (* pScreen->QueryBestSize)(StippleShape, &w, &h, pScreen);

-    if (!(pScreen->PixmapPerDepth[0] =

-			(*pScreen->CreatePixmap)(pScreen, w, h, 1, 0)))

-	return FALSE;

-    /* fill stipple with 1 */

-    tmpval[0].val = GXcopy;

-    tmpval[1].val = 1;

-    tmpval[2].val = FillSolid;

-    pgcScratch = GetScratchGC(1, pScreen);

-    if (!pgcScratch)

-    {

-	(*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);

-	return FALSE;

-    }

-    (void)ChangeGC(NullClient, pgcScratch, GCFunction|GCForeground|GCFillStyle, tmpval);

-    ValidateGC((DrawablePtr)pScreen->PixmapPerDepth[0], pgcScratch);

-    rect.x = 0;

-    rect.y = 0;

-    rect.width = w;

-    rect.height = h;

-    (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pScreen->PixmapPerDepth[0], 

-				     pgcScratch, 1, &rect);

-    FreeScratchGC(pgcScratch);

-    return TRUE;

-}

-

-void

-FreeDefaultStipple(int screenNum)

-{

-    ScreenPtr pScreen = screenInfo.screens[screenNum];

-    (*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);

-}

-

-int

-SetDashes(GCPtr pGC, unsigned offset, unsigned ndash, unsigned char *pdash)

-{

-    long i;

-    unsigned char *p, *indash;

-    BITS32 maskQ = 0;

-

-    i = ndash;

-    p = pdash;

-    while (i--)

-    {

-	if (!*p++)

-	{

-	    /* dash segment must be > 0 */

-	    return BadValue;

-	}

-    }

-

-    if (ndash & 1)

-	p = malloc(2 * ndash * sizeof(unsigned char));

-    else

-	p = malloc(ndash * sizeof(unsigned char));

-    if (!p)

-	return BadAlloc;

-

-    pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;

-    if (offset != pGC->dashOffset)

-    {

-	pGC->dashOffset = offset;

-	pGC->stateChanges |= GCDashOffset;

-	maskQ |= GCDashOffset;

-    }

-

-    if (pGC->dash != DefaultDash)

-	free(pGC->dash);

-    pGC->numInDashList = ndash;

-    pGC->dash = p;

-    if (ndash & 1)

-    {

-	pGC->numInDashList += ndash;

-	indash = pdash;

-	i = ndash;

-	while (i--)

-	    *p++ = *indash++;

-    }

-    while(ndash--)

-	*p++ = *pdash++;

-    pGC->stateChanges |= GCDashList;

-    maskQ |= GCDashList;

-

-    if (pGC->funcs->ChangeGC)

-	(*pGC->funcs->ChangeGC) (pGC, maskQ);

-    return Success;

-}

-

-int

-VerifyRectOrder(int nrects, xRectangle *prects, int ordering)

-{

-    xRectangle	*prectP, *prectN;

-    int	i;

-

-    switch(ordering)

-    {

-      case Unsorted:

-	  return CT_UNSORTED;

-      case YSorted:

-	  if(nrects > 1)

-	  {

-	      for(i = 1, prectP = prects, prectN = prects + 1;

-		  i < nrects;

-		  i++, prectP++, prectN++)

-		  if(prectN->y < prectP->y)

-		      return -1;

-	  }

-	  return CT_YSORTED;

-      case YXSorted:

-	  if(nrects > 1)

-	  {

-	      for(i = 1, prectP = prects, prectN = prects + 1;

-		  i < nrects;

-		  i++, prectP++, prectN++)

-		  if((prectN->y < prectP->y) ||

-		      ( (prectN->y == prectP->y) &&

-		        (prectN->x < prectP->x) ) )

-		      return -1;

-	  }

-	  return CT_YXSORTED;

-      case YXBanded:

-	  if(nrects > 1)

-	  {

-	      for(i = 1, prectP = prects, prectN = prects + 1;

-		  i < nrects;

-		  i++, prectP++, prectN++)

-		  if((prectN->y != prectP->y &&

- 		      prectN->y < prectP->y + (int) prectP->height) ||

-		     ((prectN->y == prectP->y) &&

-		      (prectN->height != prectP->height ||

-		       prectN->x < prectP->x + (int) prectP->width)))

-		      return -1;

-	  }

-	  return CT_YXBANDED;

-    }

-    return -1;

-}

-

-int

-SetClipRects(GCPtr pGC, int xOrigin, int yOrigin, int nrects, 

-             xRectangle *prects, int ordering)

-{

-    int			newct, size;

-    xRectangle 		*prectsNew;

-

-    newct = VerifyRectOrder(nrects, prects, ordering);

-    if (newct < 0)

-	return(BadMatch);

-    size = nrects * sizeof(xRectangle);

-    prectsNew = malloc(size);

-    if (!prectsNew && size)

-	return BadAlloc;

-

-    pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;

-    pGC->clipOrg.x = xOrigin;

-    pGC->stateChanges |= GCClipXOrigin;

-		 

-    pGC->clipOrg.y = yOrigin;

-    pGC->stateChanges |= GCClipYOrigin;

-

-    if (size)

-	memmove((char *)prectsNew, (char *)prects, size);

-    (*pGC->funcs->ChangeClip)(pGC, newct, (pointer)prectsNew, nrects);

-    if (pGC->funcs->ChangeGC)

-	(*pGC->funcs->ChangeGC) (pGC, GCClipXOrigin|GCClipYOrigin|GCClipMask);

-    return Success;

-}

-

-

-/*

-   sets reasonable defaults 

-   if we can get a pre-allocated one, use it and mark it as used.

-   if we can't, create one out of whole cloth (The Velveteen GC -- if

-   you use it often enough it will become real.)

-*/

-GCPtr

-GetScratchGC(unsigned depth, ScreenPtr pScreen)

-{

-    int i;

-    GCPtr pGC;

-

-    for (i=0; i<=pScreen->numDepths; i++)

-        if ( pScreen->GCperDepth[i]->depth == depth &&

-	     !(pScreen->rgf & (1L << (i+1)))

-	   )

-	{

-	    pScreen->rgf |= (1L << (i+1));

-            pGC = (pScreen->GCperDepth[i]);

-

-	    pGC->alu = GXcopy;

-	    pGC->planemask = ~0;

-	    pGC->serialNumber = 0;

-	    pGC->fgPixel = 0;

-	    pGC->bgPixel = 1;

-	    pGC->lineWidth = 0;

-	    pGC->lineStyle = LineSolid;

-	    pGC->capStyle = CapButt;

-	    pGC->joinStyle = JoinMiter;

-	    pGC->fillStyle = FillSolid;

-	    pGC->fillRule = EvenOddRule;

-	    pGC->arcMode = ArcChord;

-	    pGC->patOrg.x = 0;

-	    pGC->patOrg.y = 0;

-	    pGC->subWindowMode = ClipByChildren;

-	    pGC->graphicsExposures = FALSE;

-	    pGC->clipOrg.x = 0;

-	    pGC->clipOrg.y = 0;

-	    if (pGC->clientClipType != CT_NONE)

-		(*pGC->funcs->ChangeClip) (pGC, CT_NONE, NULL, 0);

-	    pGC->stateChanges = GCAllBits;

-	    return pGC;

-	}

-    /* if we make it this far, need to roll our own */

-    pGC = CreateScratchGC(pScreen, depth);

-    if (pGC)

-	pGC->graphicsExposures = FALSE;

-    return pGC;

-}

-

-/*

-   if the gc to free is in the table of pre-existing ones,

-mark it as available.

-   if not, free it for real

-*/

-void

-FreeScratchGC(GCPtr pGC)

-{

-    ScreenPtr pScreen = pGC->pScreen;

-    int i;

-

-    for (i=0; i<=pScreen->numDepths; i++)

-    {

-        if ( pScreen->GCperDepth[i] == pGC)

-	{

-	    pScreen->rgf &= ~(1L << (i+1));

-	    return;

-	}

-    }

-    (void)FreeGC(pGC, (GContext)0);

-}

+/***********************************************************
+
+Copyright 1987, 1998  The Open Group
+
+Permission to use, copy, modify, distribute, and sell this software and its
+documentation for any purpose is hereby granted without fee, provided that
+the above copyright notice appear in all copies and that both that
+copyright notice and this permission notice appear in supporting
+documentation.
+
+The above copyright notice and this permission notice shall be included in
+all copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL THE
+OPEN GROUP BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+
+Except as contained in this notice, the name of The Open Group shall not be
+used in advertising or otherwise to promote the sale, use or other dealings
+in this Software without prior written authorization from The Open Group.
+
+
+Copyright 1987 by Digital Equipment Corporation, Maynard, Massachusetts.
+
+                        All Rights Reserved
+
+Permission to use, copy, modify, and distribute this software and its 
+documentation for any purpose and without fee is hereby granted, 
+provided that the above copyright notice appear in all copies and that
+both that copyright notice and this permission notice appear in 
+supporting documentation, and that the name of Digital not be
+used in advertising or publicity pertaining to distribution of the
+software without specific, written prior permission.  
+
+DIGITAL DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING
+ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT SHALL
+DIGITAL BE LIABLE FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR
+ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS,
+WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
+ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS
+SOFTWARE.
+
+******************************************************************/
+
+
+#ifdef HAVE_DIX_CONFIG_H
+#include <dix-config.h>
+#endif
+
+#include <X11/X.h>
+#include <X11/Xmd.h>
+#include <X11/Xproto.h>
+#include "misc.h"
+#include "resource.h"
+#include "gcstruct.h"
+#include "pixmapstr.h"
+#include "dixfontstr.h"
+#include "scrnintstr.h"
+#include "region.h"
+#include "dixstruct.h"
+
+#include "privates.h"
+#include "dix.h"
+#include "xace.h"
+#include <assert.h>
+
+extern FontPtr defaultFont;
+
+static Bool CreateDefaultTile(GCPtr pGC);
+
+static unsigned char DefaultDash[2] = {4, 4};
+
+void
+ValidateGC(DrawablePtr pDraw, GC *pGC)
+{
+    (*pGC->funcs->ValidateGC) (pGC, pGC->stateChanges, pDraw);
+    pGC->stateChanges = 0;
+    pGC->serialNumber = pDraw->serialNumber;
+}
+
+
+/*
+ * ChangeGC/ChangeGCXIDs:
+ *
+ * The client performing the gc change must be passed so that access
+ * checks can be performed on any tiles, stipples, or fonts that are
+ * specified.  ddxen can call this too; they should normally pass
+ * NullClient for the client since any access checking should have
+ * already been done at a higher level.
+ * 
+ * If you have any XIDs, you must use ChangeGCXIDs:
+ * 
+ *     CARD32 v[2];
+ *     v[0] = FillTiled;
+ *     v[1] = pid;
+ *     ChangeGCXIDs(client, pGC, GCFillStyle|GCTile, v);
+ * 
+ * However, if you need to pass a pointer to a pixmap or font, you must
+ * use ChangeGC:
+ * 
+ *     ChangeGCVal v[2];
+ *     v[0].val = FillTiled;
+ *     v[1].ptr = pPixmap;
+ *     ChangeGC(client, pGC, GCFillStyle|GCTile, v);
+ * 
+ * If you have neither XIDs nor pointers, you can use either function,
+ * but ChangeGC will do less work.
+ *
+ *     ChangeGCVal v[2];
+ *     v[0].val = foreground;
+ *     v[1].val = background;
+ *     ChangeGC(client, pGC, GCForeground|GCBackground, v);
+ */
+
+#define NEXTVAL(_type, _var) { \
+	_var = (_type)(pUnion->val); pUnion++; \
+    }
+
+#define NEXT_PTR(_type, _var) { \
+    _var = (_type)pUnion->ptr; pUnion++; }
+
+int
+ChangeGC(ClientPtr client, GC *pGC, BITS32 mask, ChangeGCValPtr pUnion)
+{
+    BITS32 	index2;
+    int 	error = 0;
+    PixmapPtr 	pPixmap;
+    BITS32	maskQ;
+
+    assert(pUnion);
+    pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+
+    maskQ = mask;	/* save these for when we walk the GCque */
+    while (mask && !error) 
+    {
+	index2 = (BITS32) lowbit (mask);
+	mask &= ~index2;
+	pGC->stateChanges |= index2;
+	switch (index2)
+	{
+	    case GCFunction:
+	    {
+		CARD8 newalu;
+		NEXTVAL(CARD8, newalu);
+		if (newalu <= GXset)
+		    pGC->alu = newalu;
+		else
+		{
+		    if (client)
+			client->errorValue = newalu;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCPlaneMask:
+		NEXTVAL(unsigned long, pGC->planemask);
+		break;
+	    case GCForeground:
+		NEXTVAL(unsigned long, pGC->fgPixel);
+		/*
+		 * this is for CreateGC
+		 */
+		if (!pGC->tileIsPixel && !pGC->tile.pixmap)
+		{
+		    pGC->tileIsPixel = TRUE;
+		    pGC->tile.pixel = pGC->fgPixel;
+		}
+		break;
+	    case GCBackground:
+		NEXTVAL(unsigned long, pGC->bgPixel);
+		break;
+	    case GCLineWidth:		/* ??? line width is a CARD16 */
+		 NEXTVAL(CARD16, pGC->lineWidth);
+		break;
+	    case GCLineStyle:
+	    {
+		unsigned int newlinestyle;
+		NEXTVAL(unsigned int, newlinestyle);
+		if (newlinestyle <= LineDoubleDash)
+		    pGC->lineStyle = newlinestyle;
+		else
+		{
+		    if (client)
+			client->errorValue = newlinestyle;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCCapStyle:
+	    {
+		unsigned int newcapstyle;
+		NEXTVAL(unsigned int, newcapstyle);
+		if (newcapstyle <= CapProjecting)
+		    pGC->capStyle = newcapstyle;
+		else
+		{
+		    if (client)
+			client->errorValue = newcapstyle;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCJoinStyle:
+	    {
+		unsigned int newjoinstyle;
+		NEXTVAL(unsigned int, newjoinstyle);
+		if (newjoinstyle <= JoinBevel)
+		    pGC->joinStyle = newjoinstyle;
+		else
+		{
+		    if (client)
+			client->errorValue = newjoinstyle;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCFillStyle:
+	    {
+		unsigned int newfillstyle;
+		NEXTVAL(unsigned int, newfillstyle);
+		if (newfillstyle <= FillOpaqueStippled)
+		    pGC->fillStyle = newfillstyle;
+		else
+		{
+		    if (client)
+			client->errorValue = newfillstyle;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCFillRule:
+	    {
+		unsigned int newfillrule;
+		NEXTVAL(unsigned int, newfillrule);
+		if (newfillrule <= WindingRule)
+		    pGC->fillRule = newfillrule;
+		else
+		{
+		    if (client)
+			client->errorValue = newfillrule;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCTile:
+		NEXT_PTR(PixmapPtr, pPixmap);
+		if ((pPixmap->drawable.depth != pGC->depth) ||
+		    (pPixmap->drawable.pScreen != pGC->pScreen))
+		{
+		    error = BadMatch;
+		}
+		else
+		{
+		    pPixmap->refcnt++;
+		    if (!pGC->tileIsPixel)
+			(* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);
+		    pGC->tileIsPixel = FALSE;
+		    pGC->tile.pixmap = pPixmap;
+		}
+		break;
+	    case GCStipple:
+		NEXT_PTR(PixmapPtr, pPixmap);
+		if ((pPixmap->drawable.depth != 1) ||
+		    (pPixmap->drawable.pScreen != pGC->pScreen))
+		{
+		    error = BadMatch;
+		}
+		else
+		{
+		    pPixmap->refcnt++;
+		    if (pGC->stipple)
+			(* pGC->pScreen->DestroyPixmap)(pGC->stipple);
+		    pGC->stipple = pPixmap;
+		}
+		break;
+	    case GCTileStipXOrigin:
+		NEXTVAL(INT16, pGC->patOrg.x);
+		break;
+	    case GCTileStipYOrigin:
+		NEXTVAL(INT16, pGC->patOrg.y);
+		break;
+	    case GCFont:
+    	    {
+		FontPtr	pFont;
+		NEXT_PTR(FontPtr, pFont);
+		pFont->refcnt++;
+		if (pGC->font)
+		    CloseFont(pGC->font, (Font)0);
+		pGC->font = pFont;
+		break;
+	    }
+	    case GCSubwindowMode:
+	    {
+		unsigned int newclipmode;
+		NEXTVAL(unsigned int, newclipmode);
+		if (newclipmode <= IncludeInferiors)
+		    pGC->subWindowMode = newclipmode;
+		else
+		{
+		    if (client)
+			client->errorValue = newclipmode;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCGraphicsExposures:
+    	    {
+		unsigned int newge;
+		NEXTVAL(unsigned int, newge);
+		if (newge <= xTrue)
+		    pGC->graphicsExposures = newge;
+		else
+		{
+		    if (client)
+			client->errorValue = newge;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    case GCClipXOrigin:
+		NEXTVAL(INT16, pGC->clipOrg.x);
+		break;
+	    case GCClipYOrigin:
+		NEXTVAL(INT16, pGC->clipOrg.y);
+		break;
+	    case GCClipMask:
+		NEXT_PTR(PixmapPtr, pPixmap);
+		if (pPixmap)
+		{
+		    if ((pPixmap->drawable.depth != 1) ||
+			(pPixmap->drawable.pScreen != pGC->pScreen))
+		    {
+			error = BadMatch;
+			break;
+		    }
+		    pPixmap->refcnt++;
+		}
+		(*pGC->funcs->ChangeClip)(pGC, pPixmap ? CT_PIXMAP : CT_NONE,
+					  (pointer)pPixmap, 0);
+		break;
+	    case GCDashOffset:
+		NEXTVAL(INT16, pGC->dashOffset);
+		break;
+	    case GCDashList:
+	    {
+		CARD8 newdash;
+		NEXTVAL(CARD8, newdash);
+		if (newdash == 4)
+		{
+		    if (pGC->dash != DefaultDash)
+		    {
+			free(pGC->dash);
+			pGC->numInDashList = 2;
+			pGC->dash = DefaultDash;
+		    }
+		}
+		else if (newdash != 0)
+ 		{
+		    unsigned char *dash;
+
+		    dash = malloc(2 * sizeof(unsigned char));
+		    if (dash)
+		    {
+			if (pGC->dash != DefaultDash)
+			    free(pGC->dash);
+			pGC->numInDashList = 2;
+			pGC->dash = dash;
+			dash[0] = newdash;
+			dash[1] = newdash;
+		    }
+		    else
+			error = BadAlloc;
+		}
+ 		else
+		{
+		   if (client)
+			client->errorValue = newdash;
+		   error = BadValue;
+		}
+		break;
+	    }
+	    case GCArcMode:
+	    {
+		unsigned int newarcmode;
+		NEXTVAL(unsigned int, newarcmode);
+		if (newarcmode <= ArcPieSlice)
+		    pGC->arcMode = newarcmode;
+		else
+		{
+		    if (client)
+			client->errorValue = newarcmode;
+		    error = BadValue;
+		}
+		break;
+	    }
+	    default:
+		if (client)
+		    client->errorValue = maskQ;
+		error = BadValue;
+		break;
+	}
+    } /* end while mask && !error */
+
+    if (pGC->fillStyle == FillTiled && pGC->tileIsPixel)
+    {
+	if (!CreateDefaultTile (pGC))
+	{
+	    pGC->fillStyle = FillSolid;
+	    error = BadAlloc;
+	}
+    }
+    (*pGC->funcs->ChangeGC)(pGC, maskQ);
+    return error;
+}
+
+#undef NEXTVAL
+#undef NEXT_PTR
+
+static const struct {
+    BITS32 mask;
+    RESTYPE type;
+    Mask access_mode;
+} xidfields[] = {
+    { GCTile, RT_PIXMAP, DixReadAccess },
+    { GCStipple, RT_PIXMAP, DixReadAccess },
+    { GCFont, RT_FONT, DixUseAccess },
+    { GCClipMask, RT_PIXMAP, DixReadAccess },
+};
+
+int
+ChangeGCXIDs(ClientPtr client, GC *pGC, BITS32 mask, CARD32 *pC32)
+{
+    ChangeGCVal vals[GCLastBit + 1];
+    int i;
+    if (mask & ~GCAllBits)
+    {
+	client->errorValue = mask;
+	return BadValue;
+    }
+    for (i = Ones(mask); i--; )
+	vals[i].val = pC32[i];
+    for (i = 0; i < sizeof(xidfields) / sizeof(*xidfields); ++i)
+    {
+	int offset, rc;
+	if (!(mask & xidfields[i].mask))
+	    continue;
+	offset = Ones(mask & (xidfields[i].mask - 1));
+	if (xidfields[i].mask == GCClipMask && vals[offset].val == None)
+	{
+	    vals[offset].ptr = NullPixmap;
+	    continue;
+	}
+	rc = dixLookupResourceByType(&vals[offset].ptr, vals[offset].val,
+		xidfields[i].type, client, xidfields[i].access_mode);
+	if (rc != Success)
+	{
+	    client->errorValue = vals[offset].val;
+	    if (rc == BadValue)
+		rc = (xidfields[i].type == RT_PIXMAP) ? BadPixmap : BadFont;
+	    return rc;
+	}
+    }
+    return ChangeGC(client, pGC, mask, vals);
+}
+
+/* CreateGC(pDrawable, mask, pval, pStatus)
+   creates a default GC for the given drawable, using mask to fill
+   in any non-default values.
+   Returns a pointer to the new GC on success, NULL otherwise.
+   returns status of non-default fields in pStatus
+BUG:
+   should check for failure to create default tile
+
+*/
+GCPtr
+CreateGC(DrawablePtr pDrawable, BITS32 mask, XID *pval, int *pStatus,
+	 XID gcid, ClientPtr client)
+{
+    GCPtr pGC;
+
+    pGC = malloc(sizeof(GC));
+    if (!pGC)
+    {
+	*pStatus = BadAlloc;
+	return (GCPtr)NULL;
+    }
+
+    pGC->pScreen = pDrawable->pScreen;
+    pGC->depth = pDrawable->depth;
+    pGC->alu = GXcopy; /* dst <- src */
+    pGC->planemask = ~0;
+    pGC->serialNumber = GC_CHANGE_SERIAL_BIT;
+    pGC->funcs = 0;
+    pGC->devPrivates = NULL;
+    pGC->fgPixel = 0;
+    pGC->bgPixel = 1;
+    pGC->lineWidth = 0;
+    pGC->lineStyle = LineSolid;
+    pGC->capStyle = CapButt;
+    pGC->joinStyle = JoinMiter;
+    pGC->fillStyle = FillSolid;
+    pGC->fillRule = EvenOddRule;
+    pGC->arcMode = ArcPieSlice;
+    pGC->tile.pixel = 0;
+    pGC->tile.pixmap = NullPixmap;
+    if (mask & GCForeground)
+    {
+	/*
+	 * magic special case -- ChangeGC checks for this condition
+	 * and snags the Foreground value to create a pseudo default-tile
+	 */
+	pGC->tileIsPixel = FALSE;
+    }
+    else
+    {
+	pGC->tileIsPixel = TRUE;
+    }
+
+    pGC->patOrg.x = 0;
+    pGC->patOrg.y = 0;
+    pGC->subWindowMode = ClipByChildren;
+    pGC->graphicsExposures = TRUE;
+    pGC->clipOrg.x = 0;
+    pGC->clipOrg.y = 0;
+    pGC->clientClipType = CT_NONE;
+    pGC->clientClip = (pointer)NULL;
+    pGC->numInDashList = 2;
+    pGC->dash = DefaultDash;
+    pGC->dashOffset = 0;
+    pGC->lastWinOrg.x = 0;
+    pGC->lastWinOrg.y = 0;
+
+    /* use the default font and stipple */
+    pGC->font = defaultFont;
+    defaultFont->refcnt++;
+    pGC->stipple = pGC->pScreen->PixmapPerDepth[0];
+    pGC->stipple->refcnt++;
+
+    /* security creation/labeling check */
+    *pStatus = XaceHook(XACE_RESOURCE_ACCESS, client, gcid, RT_GC, pGC,
+			RT_NONE, NULL, DixCreateAccess|DixSetAttrAccess);
+    if (*pStatus != Success)
+	goto out;
+
+    pGC->stateChanges = GCAllBits;
+    if (!(*pGC->pScreen->CreateGC)(pGC))
+	*pStatus = BadAlloc;
+    else if (mask)
+        *pStatus = ChangeGCXIDs(client, pGC, mask, pval);
+    else
+	*pStatus = Success;
+
+out:
+    if (*pStatus != Success)
+    {
+	if (!pGC->tileIsPixel && !pGC->tile.pixmap)
+	    pGC->tileIsPixel = TRUE; /* undo special case */
+	FreeGC(pGC, (XID)0);
+	pGC = (GCPtr)NULL;
+    }
+
+    return (pGC);
+}
+
+static Bool
+CreateDefaultTile (GCPtr pGC)
+{
+    ChangeGCVal	tmpval[3];
+    PixmapPtr 	pTile;
+    GCPtr	pgcScratch;
+    xRectangle	rect;
+    CARD16	w, h;
+
+    w = 1;
+    h = 1;
+    (*pGC->pScreen->QueryBestSize)(TileShape, &w, &h, pGC->pScreen);
+    pTile = (PixmapPtr)
+	    (*pGC->pScreen->CreatePixmap)(pGC->pScreen,
+					  w, h, pGC->depth, 0);
+    pgcScratch = GetScratchGC(pGC->depth, pGC->pScreen);
+    if (!pTile || !pgcScratch)
+    {
+	if (pTile)
+	    (*pTile->drawable.pScreen->DestroyPixmap)(pTile);
+	if (pgcScratch)
+	    FreeScratchGC(pgcScratch);
+	return FALSE;
+    }
+    tmpval[0].val = GXcopy;
+    tmpval[1].val = pGC->tile.pixel;
+    tmpval[2].val = FillSolid;
+    (void)ChangeGC(NullClient, pgcScratch, GCFunction | GCForeground | GCFillStyle, tmpval);
+    ValidateGC((DrawablePtr)pTile, pgcScratch);
+    rect.x = 0;
+    rect.y = 0;
+    rect.width = w;
+    rect.height = h;
+    (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pTile, pgcScratch, 1, &rect);
+    /* Always remember to free the scratch graphics context after use. */
+    FreeScratchGC(pgcScratch);
+
+    pGC->tileIsPixel = FALSE;
+    pGC->tile.pixmap = pTile;
+    return TRUE;
+}
+
+int
+CopyGC(GC *pgcSrc, GC *pgcDst, BITS32 mask)
+{
+    BITS32	index2;
+    BITS32	maskQ;
+    int 	error = 0;
+
+    if (pgcSrc == pgcDst)
+	return Success;
+    pgcDst->serialNumber |= GC_CHANGE_SERIAL_BIT;
+    pgcDst->stateChanges |= mask;
+    maskQ = mask;
+    while (mask)
+    {
+	index2 = (BITS32) lowbit (mask);
+	mask &= ~index2;
+	switch (index2)
+	{
+	    case GCFunction:
+		pgcDst->alu = pgcSrc->alu;
+		break;
+	    case GCPlaneMask:
+		pgcDst->planemask = pgcSrc->planemask;
+		break;
+	    case GCForeground:
+		pgcDst->fgPixel = pgcSrc->fgPixel;
+		break;
+	    case GCBackground:
+		pgcDst->bgPixel = pgcSrc->bgPixel;
+		break;
+	    case GCLineWidth:
+		pgcDst->lineWidth = pgcSrc->lineWidth;
+		break;
+	    case GCLineStyle:
+		pgcDst->lineStyle = pgcSrc->lineStyle;
+		break;
+	    case GCCapStyle:
+		pgcDst->capStyle = pgcSrc->capStyle;
+		break;
+	    case GCJoinStyle:
+		pgcDst->joinStyle = pgcSrc->joinStyle;
+		break;
+	    case GCFillStyle:
+		pgcDst->fillStyle = pgcSrc->fillStyle;
+		break;
+	    case GCFillRule:
+		pgcDst->fillRule = pgcSrc->fillRule;
+		break;
+	    case GCTile:
+		{
+		    if (EqualPixUnion(pgcDst->tileIsPixel,
+				      pgcDst->tile,
+				      pgcSrc->tileIsPixel,
+				      pgcSrc->tile))
+		    {
+			break;
+		    }
+		    if (!pgcDst->tileIsPixel)
+			(* pgcDst->pScreen->DestroyPixmap)(pgcDst->tile.pixmap);
+		    pgcDst->tileIsPixel = pgcSrc->tileIsPixel;
+		    pgcDst->tile = pgcSrc->tile;
+		    if (!pgcDst->tileIsPixel)
+		       pgcDst->tile.pixmap->refcnt++;
+		    break;
+		}
+	    case GCStipple:
+		{
+		    if (pgcDst->stipple == pgcSrc->stipple)
+			break;
+		    if (pgcDst->stipple)
+			(* pgcDst->pScreen->DestroyPixmap)(pgcDst->stipple);
+		    pgcDst->stipple = pgcSrc->stipple;
+		    if (pgcDst->stipple)
+			pgcDst->stipple->refcnt ++;
+		    break;
+		}
+	    case GCTileStipXOrigin:
+		pgcDst->patOrg.x = pgcSrc->patOrg.x;
+		break;
+	    case GCTileStipYOrigin:
+		pgcDst->patOrg.y = pgcSrc->patOrg.y;
+		break;
+	    case GCFont:
+		if (pgcDst->font == pgcSrc->font)
+		    break;
+		if (pgcDst->font)
+		    CloseFont(pgcDst->font, (Font)0);
+		if ((pgcDst->font = pgcSrc->font) != NullFont)
+		    (pgcDst->font)->refcnt++;
+		break;
+	    case GCSubwindowMode:
+		pgcDst->subWindowMode = pgcSrc->subWindowMode;
+		break;
+	    case GCGraphicsExposures:
+		pgcDst->graphicsExposures = pgcSrc->graphicsExposures;
+		break;
+	    case GCClipXOrigin:
+		pgcDst->clipOrg.x = pgcSrc->clipOrg.x;
+		break;
+	    case GCClipYOrigin:
+		pgcDst->clipOrg.y = pgcSrc->clipOrg.y;
+		break;
+	    case GCClipMask:
+		(* pgcDst->funcs->CopyClip)(pgcDst, pgcSrc);
+		break;
+	    case GCDashOffset:
+		pgcDst->dashOffset = pgcSrc->dashOffset;
+		break;
+	    case GCDashList:
+		if (pgcSrc->dash == DefaultDash)
+		{
+		    if (pgcDst->dash != DefaultDash)
+		    {
+			free(pgcDst->dash);
+			pgcDst->numInDashList = pgcSrc->numInDashList;
+			pgcDst->dash = pgcSrc->dash;
+		    }
+		}
+		else
+		{
+		    unsigned char *dash;
+		    unsigned int i;
+
+		    dash = malloc(pgcSrc->numInDashList * sizeof(unsigned char));
+		    if (dash)
+		    {
+			if (pgcDst->dash != DefaultDash)
+			    free(pgcDst->dash);
+			pgcDst->numInDashList = pgcSrc->numInDashList;
+			pgcDst->dash = dash;
+			for (i=0; i<pgcSrc->numInDashList; i++)
+			    dash[i] = pgcSrc->dash[i];
+		    }
+		    else
+			error = BadAlloc;
+		}
+		break;
+	    case GCArcMode:
+		pgcDst->arcMode = pgcSrc->arcMode;
+		break;
+	    default:
+		FatalError ("CopyGC: Unhandled mask!\n");
+	}
+    }
+    if (pgcDst->fillStyle == FillTiled && pgcDst->tileIsPixel)
+    {
+	if (!CreateDefaultTile (pgcDst))
+	{
+	    pgcDst->fillStyle = FillSolid;
+	    error = BadAlloc;
+	}
+    }
+    (*pgcDst->funcs->CopyGC) (pgcSrc, maskQ, pgcDst);
+    return error;
+}
+
+/**
+ * does the diX part of freeing the characteristics in the GC.
+ *
+ *  \param value  must conform to DeleteType
+ */
+int
+FreeGC(pointer value, XID gid)
+{
+    GCPtr pGC = (GCPtr)value;
+
+    CloseFont(pGC->font, (Font)0);
+    (* pGC->funcs->DestroyClip)(pGC);
+
+    if (!pGC->tileIsPixel)
+	(* pGC->pScreen->DestroyPixmap)(pGC->tile.pixmap);
+    if (pGC->stipple)
+	(* pGC->pScreen->DestroyPixmap)(pGC->stipple);
+
+    (*pGC->funcs->DestroyGC) (pGC);
+    if (pGC->dash != DefaultDash)
+	free(pGC->dash);
+    dixFreePrivates(pGC->devPrivates);
+    free(pGC);
+    return(Success);
+}
+
+/* CreateScratchGC(pScreen, depth)
+    like CreateGC, but doesn't do the default tile or stipple,
+since we can't create them without already having a GC.  any code
+using the tile or stipple has to set them explicitly anyway,
+since the state of the scratch gc is unknown.  This is OK
+because ChangeGC() has to be able to deal with NULL tiles and
+stipples anyway (in case the CreateGC() call has provided a 
+value for them -- we can't set the default tile until the
+client-supplied attributes are installed, since the fgPixel
+is what fills the default tile.  (maybe this comment should
+go with CreateGC() or ChangeGC().)
+*/
+
+GCPtr
+CreateScratchGC(ScreenPtr pScreen, unsigned depth)
+{
+    GCPtr pGC;
+
+    pGC = malloc(sizeof(GC));
+    if (!pGC)
+	return (GCPtr)NULL;
+
+    pGC->pScreen = pScreen;
+    pGC->depth = depth;
+    pGC->alu = GXcopy; /* dst <- src */
+    pGC->planemask = ~0;
+    pGC->serialNumber = 0;
+    pGC->devPrivates = NULL;
+    pGC->fgPixel = 0;
+    pGC->bgPixel = 1;
+    pGC->lineWidth = 0;
+    pGC->lineStyle = LineSolid;
+    pGC->capStyle = CapButt;
+    pGC->joinStyle = JoinMiter;
+    pGC->fillStyle = FillSolid;
+    pGC->fillRule = EvenOddRule;
+    pGC->arcMode = ArcPieSlice;
+    pGC->font = defaultFont;
+    if ( pGC->font)  /* necessary, because open of default font could fail */
+	pGC->font->refcnt++;
+    pGC->tileIsPixel = TRUE;
+    pGC->tile.pixel = 0;
+    pGC->tile.pixmap = NullPixmap;
+    pGC->stipple = NullPixmap;
+    pGC->patOrg.x = 0;
+    pGC->patOrg.y = 0;
+    pGC->subWindowMode = ClipByChildren;
+    pGC->graphicsExposures = TRUE;
+    pGC->clipOrg.x = 0;
+    pGC->clipOrg.y = 0;
+    pGC->clientClipType = CT_NONE;
+    pGC->dashOffset = 0;
+    pGC->numInDashList = 2;
+    pGC->dash = DefaultDash;
+    pGC->lastWinOrg.x = 0;
+    pGC->lastWinOrg.y = 0;
+
+    pGC->stateChanges = GCAllBits;
+    if (!(*pScreen->CreateGC)(pGC))
+    {
+	FreeGC(pGC, (XID)0);
+	pGC = (GCPtr)NULL;
+    }
+    return pGC;
+}
+
+void
+FreeGCperDepth(int screenNum)
+{
+    int i;
+    ScreenPtr pScreen;
+    GCPtr *ppGC;
+
+    pScreen = screenInfo.screens[screenNum];
+    ppGC = pScreen->GCperDepth;
+
+    for (i = 0; i <= pScreen->numDepths; i++)
+	(void)FreeGC(ppGC[i], (XID)0);
+    pScreen->rgf = ~0L;
+}
+
+
+Bool
+CreateGCperDepth(int screenNum)
+{
+    int i;
+    ScreenPtr pScreen;
+    DepthPtr pDepth;
+    GCPtr *ppGC;
+
+    pScreen = screenInfo.screens[screenNum];
+    pScreen->rgf = 0;
+    ppGC = pScreen->GCperDepth;
+    /* do depth 1 separately because it's not included in list */
+    if (!(ppGC[0] = CreateScratchGC(pScreen, 1)))
+	return FALSE;
+    ppGC[0]->graphicsExposures = FALSE;
+    /* Make sure we don't overflow GCperDepth[] */
+    if( pScreen->numDepths > MAXFORMATS )
+	    return FALSE;
+
+    pDepth = pScreen->allowedDepths;
+    for (i=0; i<pScreen->numDepths; i++, pDepth++)
+    {
+	if (!(ppGC[i+1] = CreateScratchGC(pScreen, pDepth->depth)))
+	{
+	    for (; i >= 0; i--)
+		(void)FreeGC(ppGC[i], (XID)0);
+	    return FALSE;
+	}
+	ppGC[i+1]->graphicsExposures = FALSE;
+    }
+    return TRUE;
+}
+
+Bool
+CreateDefaultStipple(int screenNum)
+{
+    ScreenPtr pScreen;
+    ChangeGCVal tmpval[3];
+    xRectangle rect;
+    CARD16 w, h;
+    GCPtr pgcScratch;
+
+    pScreen = screenInfo.screens[screenNum];
+
+    w = 16;
+    h = 16;
+    (* pScreen->QueryBestSize)(StippleShape, &w, &h, pScreen);
+    if (!(pScreen->PixmapPerDepth[0] =
+			(*pScreen->CreatePixmap)(pScreen, w, h, 1, 0)))
+	return FALSE;
+    /* fill stipple with 1 */
+    tmpval[0].val = GXcopy;
+    tmpval[1].val = 1;
+    tmpval[2].val = FillSolid;
+    pgcScratch = GetScratchGC(1, pScreen);
+    if (!pgcScratch)
+    {
+	(*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);
+	return FALSE;
+    }
+    (void)ChangeGC(NullClient, pgcScratch, GCFunction|GCForeground|GCFillStyle, tmpval);
+    ValidateGC((DrawablePtr)pScreen->PixmapPerDepth[0], pgcScratch);
+    rect.x = 0;
+    rect.y = 0;
+    rect.width = w;
+    rect.height = h;
+    (*pgcScratch->ops->PolyFillRect)((DrawablePtr)pScreen->PixmapPerDepth[0], 
+				     pgcScratch, 1, &rect);
+    FreeScratchGC(pgcScratch);
+    return TRUE;
+}
+
+void
+FreeDefaultStipple(int screenNum)
+{
+    ScreenPtr pScreen = screenInfo.screens[screenNum];
+    (*pScreen->DestroyPixmap)(pScreen->PixmapPerDepth[0]);
+}
+
+int
+SetDashes(GCPtr pGC, unsigned offset, unsigned ndash, unsigned char *pdash)
+{
+    long i;
+    unsigned char *p, *indash;
+    BITS32 maskQ = 0;
+
+    i = ndash;
+    p = pdash;
+    while (i--)
+    {
+	if (!*p++)
+	{
+	    /* dash segment must be > 0 */
+	    return BadValue;
+	}
+    }
+
+    if (ndash & 1)
+	p = malloc(2 * ndash * sizeof(unsigned char));
+    else
+	p = malloc(ndash * sizeof(unsigned char));
+    if (!p)
+	return BadAlloc;
+
+    pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+    if (offset != pGC->dashOffset)
+    {
+	pGC->dashOffset = offset;
+	pGC->stateChanges |= GCDashOffset;
+	maskQ |= GCDashOffset;
+    }
+
+    if (pGC->dash != DefaultDash)
+	free(pGC->dash);
+    pGC->numInDashList = ndash;
+    pGC->dash = p;
+    if (ndash & 1)
+    {
+	pGC->numInDashList += ndash;
+	indash = pdash;
+	i = ndash;
+	while (i--)
+	    *p++ = *indash++;
+    }
+    while(ndash--)
+	*p++ = *pdash++;
+    pGC->stateChanges |= GCDashList;
+    maskQ |= GCDashList;
+
+    if (pGC->funcs->ChangeGC)
+	(*pGC->funcs->ChangeGC) (pGC, maskQ);
+    return Success;
+}
+
+int
+VerifyRectOrder(int nrects, xRectangle *prects, int ordering)
+{
+    xRectangle	*prectP, *prectN;
+    int	i;
+
+    switch(ordering)
+    {
+      case Unsorted:
+	  return CT_UNSORTED;
+      case YSorted:
+	  if(nrects > 1)
+	  {
+	      for(i = 1, prectP = prects, prectN = prects + 1;
+		  i < nrects;
+		  i++, prectP++, prectN++)
+		  if(prectN->y < prectP->y)
+		      return -1;
+	  }
+	  return CT_YSORTED;
+      case YXSorted:
+	  if(nrects > 1)
+	  {
+	      for(i = 1, prectP = prects, prectN = prects + 1;
+		  i < nrects;
+		  i++, prectP++, prectN++)
+		  if((prectN->y < prectP->y) ||
+		      ( (prectN->y == prectP->y) &&
+		        (prectN->x < prectP->x) ) )
+		      return -1;
+	  }
+	  return CT_YXSORTED;
+      case YXBanded:
+	  if(nrects > 1)
+	  {
+	      for(i = 1, prectP = prects, prectN = prects + 1;
+		  i < nrects;
+		  i++, prectP++, prectN++)
+		  if((prectN->y != prectP->y &&
+ 		      prectN->y < prectP->y + (int) prectP->height) ||
+		     ((prectN->y == prectP->y) &&
+		      (prectN->height != prectP->height ||
+		       prectN->x < prectP->x + (int) prectP->width)))
+		      return -1;
+	  }
+	  return CT_YXBANDED;
+    }
+    return -1;
+}
+
+int
+SetClipRects(GCPtr pGC, int xOrigin, int yOrigin, int nrects, 
+             xRectangle *prects, int ordering)
+{
+    int			newct, size;
+    xRectangle 		*prectsNew;
+
+    newct = VerifyRectOrder(nrects, prects, ordering);
+    if (newct < 0)
+	return(BadMatch);
+    size = nrects * sizeof(xRectangle);
+    prectsNew = malloc(size);
+    if (!prectsNew && size)
+	return BadAlloc;
+
+    pGC->serialNumber |= GC_CHANGE_SERIAL_BIT;
+    pGC->clipOrg.x = xOrigin;
+    pGC->stateChanges |= GCClipXOrigin;
+		 
+    pGC->clipOrg.y = yOrigin;
+    pGC->stateChanges |= GCClipYOrigin;
+
+    if (size)
+	memmove((char *)prectsNew, (char *)prects, size);
+    (*pGC->funcs->ChangeClip)(pGC, newct, (pointer)prectsNew, nrects);
+    if (pGC->funcs->ChangeGC)
+	(*pGC->funcs->ChangeGC) (pGC, GCClipXOrigin|GCClipYOrigin|GCClipMask);
+    return Success;
+}
+
+
+/*
+   sets reasonable defaults 
+   if we can get a pre-allocated one, use it and mark it as used.
+   if we can't, create one out of whole cloth (The Velveteen GC -- if
+   you use it often enough it will become real.)
+*/
+GCPtr
+GetScratchGC(unsigned depth, ScreenPtr pScreen)
+{
+    int i;
+    GCPtr pGC;
+
+    for (i=0; i<=pScreen->numDepths; i++)
+        if ( pScreen->GCperDepth[i]->depth == depth &&
+	     !(pScreen->rgf & (1L << (i+1)))
+	   )
+	{
+	    pScreen->rgf |= (1L << (i+1));
+            pGC = (pScreen->GCperDepth[i]);
+
+	    pGC->alu = GXcopy;
+	    pGC->planemask = ~0;
+	    pGC->serialNumber = 0;
+	    pGC->fgPixel = 0;
+	    pGC->bgPixel = 1;
+	    pGC->lineWidth = 0;
+	    pGC->lineStyle = LineSolid;
+	    pGC->capStyle = CapButt;
+	    pGC->joinStyle = JoinMiter;
+	    pGC->fillStyle = FillSolid;
+	    pGC->fillRule = EvenOddRule;
+	    pGC->arcMode = ArcChord;
+	    pGC->patOrg.x = 0;
+	    pGC->patOrg.y = 0;
+	    pGC->subWindowMode = ClipByChildren;
+	    pGC->graphicsExposures = FALSE;
+	    pGC->clipOrg.x = 0;
+	    pGC->clipOrg.y = 0;
+	    if (pGC->clientClipType != CT_NONE)
+		(*pGC->funcs->ChangeClip) (pGC, CT_NONE, NULL, 0);
+	    pGC->stateChanges = GCAllBits;
+	    return pGC;
+	}
+    /* if we make it this far, need to roll our own */
+    pGC = CreateScratchGC(pScreen, depth);
+    if (pGC)
+	pGC->graphicsExposures = FALSE;
+    return pGC;
+}
+
+/*
+   if the gc to free is in the table of pre-existing ones,
+mark it as available.
+   if not, free it for real
+*/
+void
+FreeScratchGC(GCPtr pGC)
+{
+    ScreenPtr pScreen = pGC->pScreen;
+    int i;
+
+    for (i=0; i<=pScreen->numDepths; i++)
+    {
+        if ( pScreen->GCperDepth[i] == pGC)
+	{
+	    pScreen->rgf &= ~(1L << (i+1));
+	    return;
+	}
+    }
+    (void)FreeGC(pGC, (GContext)0);
+}